diff --git a/src/ui/3d/map3dexportwidget.ui b/src/ui/3d/map3dexportwidget.ui
index f065e5d3ecb..ddeaa5f258d 100644
--- a/src/ui/3d/map3dexportwidget.ui
+++ b/src/ui/3d/map3dexportwidget.ui
@@ -26,7 +26,7 @@
    <item row="0" column="0">
     <layout class="QGridLayout" name="gridLayout">
      <item row="3" column="1" colspan="2">
-      <widget class="QSpinBox" name="terrainTextureResolutionSpinBox">
+      <widget class="QgsSpinBox" name="terrainTextureResolutionSpinBox">
        <property name="minimum">
         <number>16</number>
        </property>
@@ -90,7 +90,7 @@
       </widget>
      </item>
      <item row="2" column="1" colspan="2">
-      <widget class="QSpinBox" name="terrainResolutionSpinBox">
+      <widget class="QgsSpinBox" name="terrainResolutionSpinBox">
        <property name="minimum">
         <number>1</number>
        </property>
@@ -161,6 +161,11 @@
    <header>qgsfilewidget.h</header>
    <container>1</container>
   </customwidget>
+  <customwidget>
+   <class>QgsSpinBox</class>
+   <extends>QSpinBox</extends>
+   <header>qgsspinbox.h</header>
+  </customwidget>
  </customwidgets>
  <tabstops>
   <tabstop>sceneNameLineEdit</tabstop>
diff --git a/src/ui/3d/qgsvectorlayer3dpropertieswidget.ui b/src/ui/3d/qgsvectorlayer3dpropertieswidget.ui
index 0146439a2ba..e0835f0783c 100644
--- a/src/ui/3d/qgsvectorlayer3dpropertieswidget.ui
+++ b/src/ui/3d/qgsvectorlayer3dpropertieswidget.ui
@@ -42,7 +42,7 @@
          </widget>
         </item>
         <item>
-         <widget class="QSpinBox" name="spinZoomLevelsCount">
+         <widget class="QgsSpinBox" name="spinZoomLevelsCount">
           <property name="minimum">
            <number>1</number>
           </property>
@@ -75,6 +75,11 @@
    <header>qgscollapsiblegroupbox.h</header>
    <container>1</container>
   </customwidget>
+  <customwidget>
+   <class>QgsSpinBox</class>
+   <extends>QSpinBox</extends>
+   <header>qgsspinbox.h</header>
+  </customwidget>
  </customwidgets>
  <resources/>
  <connections/>
diff --git a/src/ui/attributeformconfig/qgsattributeformcontaineredit.ui b/src/ui/attributeformconfig/qgsattributeformcontaineredit.ui
index 2964dd1c20f..1437295d45f 100644
--- a/src/ui/attributeformconfig/qgsattributeformcontaineredit.ui
+++ b/src/ui/attributeformconfig/qgsattributeformcontaineredit.ui
@@ -64,7 +64,7 @@
     </widget>
    </item>
    <item row="3" column="1">
-    <widget class="QSpinBox" name="mColumnCountSpinBox">
+    <widget class="QgsSpinBox" name="mColumnCountSpinBox">
      <property name="minimum">
       <number>1</number>
      </property>
@@ -116,6 +116,11 @@
    <extends>QToolButton</extends>
    <header>qgscolorbutton.h</header>
   </customwidget>
+  <customwidget>
+   <class>QgsSpinBox</class>
+   <extends>QSpinBox</extends>
+   <header>qgsspinbox.h</header>
+  </customwidget>
   <customwidget>
    <class>QgsFieldExpressionWidget</class>
    <extends>QWidget</extends>
diff --git a/src/ui/auth/qgsauthsslimportdialog.ui b/src/ui/auth/qgsauthsslimportdialog.ui
index b98a35d7b61..7405c1d8c85 100644
--- a/src/ui/auth/qgsauthsslimportdialog.ui
+++ b/src/ui/auth/qgsauthsslimportdialog.ui
@@ -127,7 +127,7 @@
              </widget>
             </item>
             <item>
-             <widget class="QSpinBox" name="spinbxPort">
+             <widget class="QgsSpinBox" name="spinbxPort">
               <property name="maximum">
                <number>50000</number>
               </property>
@@ -170,7 +170,7 @@
            </widget>
           </item>
           <item>
-           <widget class="QSpinBox" name="spinbxTimeout">
+           <widget class="QgsSpinBox" name="spinbxTimeout">
             <property name="font">
              <font>
               <pointsize>8</pointsize>
@@ -273,6 +273,11 @@
    <header>qgsauthsslconfigwidget.h</header>
    <container>1</container>
   </customwidget>
+  <customwidget>
+   <class>QgsSpinBox</class>
+   <extends>QSpinBox</extends>
+   <header>qgsspinbox.h</header>
+  </customwidget>
   <customwidget>
    <class>QgsCollapsibleGroupBoxBasic</class>
    <extends>QGroupBox</extends>
diff --git a/src/ui/editorwidgets/qgsrangeconfigdlgbase.ui b/src/ui/editorwidgets/qgsrangeconfigdlgbase.ui
index 008819fabaa..5488f56056f 100644
--- a/src/ui/editorwidgets/qgsrangeconfigdlgbase.ui
+++ b/src/ui/editorwidgets/qgsrangeconfigdlgbase.ui
@@ -52,7 +52,7 @@
        </widget>
       </item>
       <item row="1" column="1">
-       <widget class="QSpinBox" name="precisionSpinBox">
+       <widget class="QgsSpinBox" name="precisionSpinBox">
         <property name="toolTip">
          <string>Number of decimal places</string>
         </property>
@@ -108,7 +108,7 @@
         </widget>
        </item>
        <item row="0" column="1">
-        <widget class="QSpinBox" name="minimumSpinBox"/>
+        <widget class="QgsSpinBox" name="minimumSpinBox"/>
        </item>
        <item row="1" column="0">
         <widget class="QLabel" name="maximumLabel">
@@ -118,7 +118,7 @@
         </widget>
        </item>
        <item row="1" column="1">
-        <widget class="QSpinBox" name="maximumSpinBox"/>
+        <widget class="QgsSpinBox" name="maximumSpinBox"/>
        </item>
        <item row="2" column="0">
         <widget class="QLabel" name="stepLabel">
@@ -128,7 +128,7 @@
         </widget>
        </item>
        <item row="2" column="1">
-        <widget class="QSpinBox" name="stepSpinBox"/>
+        <widget class="QgsSpinBox" name="stepSpinBox"/>
        </item>
       </layout>
      </widget>
@@ -185,6 +185,11 @@
   </layout>
  </widget>
  <customwidgets>
+  <customwidget>
+   <class>QgsSpinBox</class>
+   <extends>QSpinBox</extends>
+   <header>qgsspinbox.h</header>
+  </customwidget>
   <customwidget>
    <class>QgsDoubleSpinBox</class>
    <extends>QDoubleSpinBox</extends>
diff --git a/src/ui/editorwidgets/qgsvaluerelationconfigdlgbase.ui b/src/ui/editorwidgets/qgsvaluerelationconfigdlgbase.ui
index 3ffd9cada0b..81e25c7f555 100644
--- a/src/ui/editorwidgets/qgsvaluerelationconfigdlgbase.ui
+++ b/src/ui/editorwidgets/qgsvaluerelationconfigdlgbase.ui
@@ -124,7 +124,7 @@
     </widget>
    </item>
    <item row="9" column="1">
-    <widget class="QSpinBox" name="mNofColumns"/>
+    <widget class="QgsSpinBox" name="mNofColumns"/>
    </item>
    <item row="2" column="1">
     <widget class="QgsFieldComboBox" name="mKeyColumn"/>
@@ -157,6 +157,11 @@
    <extends>QComboBox</extends>
    <header>qgsfieldcombobox.h</header>
   </customwidget>
+  <customwidget>
+   <class>QgsSpinBox</class>
+   <extends>QSpinBox</extends>
+   <header>qgsspinbox.h</header>
+  </customwidget>
   <customwidget>
    <class>QgsMapLayerComboBox</class>
    <extends>QComboBox</extends>
diff --git a/src/ui/effects/widget_coloreffects.ui b/src/ui/effects/widget_coloreffects.ui
index b1fcd1c0e41..a04d21e4cb2 100644
--- a/src/ui/effects/widget_coloreffects.ui
+++ b/src/ui/effects/widget_coloreffects.ui
@@ -171,7 +171,7 @@
          </widget>
         </item>
         <item row="3" column="2">
-         <widget class="QSpinBox" name="mColorizeStrengthSpinBox">
+         <widget class="QgsSpinBox" name="mColorizeStrengthSpinBox">
           <property name="suffix">
            <string>%</string>
           </property>
@@ -301,6 +301,11 @@
    <extends>QComboBox</extends>
    <header>qgseffectdrawmodecombobox.h</header>
   </customwidget>
+  <customwidget>
+   <class>QgsSpinBox</class>
+   <extends>QSpinBox</extends>
+   <header>qgsspinbox.h</header>
+  </customwidget>
   <customwidget>
    <class>QgsOpacityWidget</class>
    <extends>QWidget</extends>
diff --git a/src/ui/layout/qgslayoutnewpagedialog.ui b/src/ui/layout/qgslayoutnewpagedialog.ui
index 7542997d8ba..6e65e3ea43c 100644
--- a/src/ui/layout/qgslayoutnewpagedialog.ui
+++ b/src/ui/layout/qgslayoutnewpagedialog.ui
@@ -137,7 +137,7 @@
    <item row="1" column="0" colspan="4">
     <layout class="QGridLayout" name="gridLayout_4" columnstretch="0,1,0,1">
      <item row="0" column="1">
-      <widget class="QSpinBox" name="mPagesSpinBox">
+      <widget class="QgsSpinBox" name="mPagesSpinBox">
        <property name="minimum">
         <number>1</number>
        </property>
@@ -193,7 +193,7 @@
       </widget>
      </item>
      <item row="1" column="2">
-      <widget class="QSpinBox" name="mExistingPageSpinBox">
+      <widget class="QgsSpinBox" name="mExistingPageSpinBox">
        <property name="minimum">
         <number>1</number>
        </property>
@@ -243,6 +243,11 @@
    <extends>QComboBox</extends>
    <header>qgslayoutunitscombobox.h</header>
   </customwidget>
+  <customwidget>
+   <class>QgsSpinBox</class>
+   <extends>QSpinBox</extends>
+   <header>qgsspinbox.h</header>
+  </customwidget>
  </customwidgets>
  <tabstops>
   <tabstop>mPagesSpinBox</tabstop>
diff --git a/src/ui/mesh/qgsmeshlayerpropertiesbase.ui b/src/ui/mesh/qgsmeshlayerpropertiesbase.ui
index 3f720394f11..fea3392fa80 100644
--- a/src/ui/mesh/qgsmeshlayerpropertiesbase.ui
+++ b/src/ui/mesh/qgsmeshlayerpropertiesbase.ui
@@ -471,7 +471,7 @@ border-radius: 2px;</string>
                </widget>
               </item>
               <item row="1" column="2">
-               <widget class="QSpinBox" name="mSimplifyMeshResolutionSpinBox">
+               <widget class="QgsSpinBox" name="mSimplifyMeshResolutionSpinBox">
                 <property name="suffix">
                  <string> pixels/triangle</string>
                 </property>
@@ -776,6 +776,11 @@ border-radius: 2px;</string>
    <extends>QDoubleSpinBox</extends>
    <header>qgsdoublespinbox.h</header>
   </customwidget>
+  <customwidget>
+   <class>QgsSpinBox</class>
+   <extends>QSpinBox</extends>
+   <header>qgsspinbox.h</header>
+  </customwidget>
   <customwidget>
    <class>QgsScrollArea</class>
    <extends>QScrollArea</extends>
diff --git a/src/ui/mesh/qgsmeshrenderervectorsettingswidgetbase.ui b/src/ui/mesh/qgsmeshrenderervectorsettingswidgetbase.ui
index acc62e0f035..dd8e35d0454 100644
--- a/src/ui/mesh/qgsmeshrenderervectorsettingswidgetbase.ui
+++ b/src/ui/mesh/qgsmeshrenderervectorsettingswidgetbase.ui
@@ -252,7 +252,7 @@
          </widget>
         </item>
         <item row="1" column="1">
-         <widget class="QSpinBox" name="mYSpacingSpinBox">
+         <widget class="QgsSpinBox" name="mYSpacingSpinBox">
           <property name="suffix">
            <string> px</string>
           </property>
@@ -561,7 +561,7 @@
          </widget>
         </item>
         <item>
-         <widget class="QSpinBox" name="mTracesParticlesCountSpinBox">
+         <widget class="QgsSpinBox" name="mTracesParticlesCountSpinBox">
           <property name="maximum">
            <number>1000000</number>
           </property>
diff --git a/src/ui/numericformats/qgsbasicnumericformatwidgetbase.ui b/src/ui/numericformats/qgsbasicnumericformatwidgetbase.ui
index b74feea7a96..8dd2292421f 100644
--- a/src/ui/numericformats/qgsbasicnumericformatwidgetbase.ui
+++ b/src/ui/numericformats/qgsbasicnumericformatwidgetbase.ui
@@ -66,7 +66,7 @@
     </widget>
    </item>
    <item row="0" column="1">
-    <widget class="QSpinBox" name="mDecimalsSpinBox">
+    <widget class="QgsSpinBox" name="mDecimalsSpinBox">
      <property name="value">
       <number>6</number>
      </property>
@@ -125,6 +125,11 @@
    <header>qgspanelwidget.h</header>
    <container>1</container>
   </customwidget>
+  <customwidget>
+   <class>QgsSpinBox</class>
+   <extends>QSpinBox</extends>
+   <header>qgsspinbox.h</header>
+  </customwidget>
   <customwidget>
    <class>QgsFilterLineEdit</class>
    <extends>QLineEdit</extends>
diff --git a/src/ui/numericformats/qgsbearingnumericformatwidgetbase.ui b/src/ui/numericformats/qgsbearingnumericformatwidgetbase.ui
index 864024618c1..b683c6b1e85 100644
--- a/src/ui/numericformats/qgsbearingnumericformatwidgetbase.ui
+++ b/src/ui/numericformats/qgsbearingnumericformatwidgetbase.ui
@@ -28,7 +28,7 @@
     </spacer>
    </item>
    <item row="1" column="1">
-    <widget class="QSpinBox" name="mDecimalsSpinBox">
+    <widget class="QgsSpinBox" name="mDecimalsSpinBox">
      <property name="value">
       <number>6</number>
      </property>
@@ -61,6 +61,11 @@
   </layout>
  </widget>
  <customwidgets>
+  <customwidget>
+   <class>QgsSpinBox</class>
+   <extends>QSpinBox</extends>
+   <header>qgsspinbox.h</header>
+  </customwidget>
   <customwidget>
    <class>QgsPanelWidget</class>
    <extends>QWidget</extends>
diff --git a/src/ui/numericformats/qgscurrencynumericformatwidgetbase.ui b/src/ui/numericformats/qgscurrencynumericformatwidgetbase.ui
index e395a1986c3..b8d7b453ff7 100644
--- a/src/ui/numericformats/qgscurrencynumericformatwidgetbase.ui
+++ b/src/ui/numericformats/qgscurrencynumericformatwidgetbase.ui
@@ -43,7 +43,7 @@
     </widget>
    </item>
    <item row="2" column="1">
-    <widget class="QSpinBox" name="mDecimalsSpinBox">
+    <widget class="QgsSpinBox" name="mDecimalsSpinBox">
      <property name="value">
       <number>2</number>
      </property>
@@ -92,6 +92,11 @@
   </layout>
  </widget>
  <customwidgets>
+  <customwidget>
+   <class>QgsSpinBox</class>
+   <extends>QSpinBox</extends>
+   <header>qgsspinbox.h</header>
+  </customwidget>
   <customwidget>
    <class>QgsPanelWidget</class>
    <extends>QWidget</extends>
diff --git a/src/ui/numericformats/qgspercentagenumericformatwidgetbase.ui b/src/ui/numericformats/qgspercentagenumericformatwidgetbase.ui
index d5e263702eb..bf2bebef2d6 100644
--- a/src/ui/numericformats/qgspercentagenumericformatwidgetbase.ui
+++ b/src/ui/numericformats/qgspercentagenumericformatwidgetbase.ui
@@ -45,7 +45,7 @@
     </widget>
    </item>
    <item row="0" column="1">
-    <widget class="QSpinBox" name="mDecimalsSpinBox">
+    <widget class="QgsSpinBox" name="mDecimalsSpinBox">
      <property name="value">
       <number>2</number>
      </property>
@@ -78,6 +78,11 @@
   </layout>
  </widget>
  <customwidgets>
+  <customwidget>
+   <class>QgsSpinBox</class>
+   <extends>QSpinBox</extends>
+   <header>qgsspinbox.h</header>
+  </customwidget>
   <customwidget>
    <class>QgsPanelWidget</class>
    <extends>QWidget</extends>
diff --git a/src/ui/numericformats/qgsscientificnumericformatwidgetbase.ui b/src/ui/numericformats/qgsscientificnumericformatwidgetbase.ui
index 148a900063a..0cc392b3660 100644
--- a/src/ui/numericformats/qgsscientificnumericformatwidgetbase.ui
+++ b/src/ui/numericformats/qgsscientificnumericformatwidgetbase.ui
@@ -15,7 +15,7 @@
   </property>
   <layout class="QGridLayout" name="gridLayout">
    <item row="0" column="1">
-    <widget class="QSpinBox" name="mDecimalsSpinBox">
+    <widget class="QgsSpinBox" name="mDecimalsSpinBox">
      <property name="value">
       <number>6</number>
      </property>
diff --git a/src/ui/qgsaddattrdialogbase.ui b/src/ui/qgsaddattrdialogbase.ui
index 4b21d118475..e44a2959595 100644
--- a/src/ui/qgsaddattrdialogbase.ui
+++ b/src/ui/qgsaddattrdialogbase.ui
@@ -87,7 +87,7 @@
     </widget>
    </item>
    <item row="4" column="1">
-    <widget class="QSpinBox" name="mLength">
+    <widget class="QgsSpinBox" name="mLength">
      <property name="toolTip">
       <string>Total length of field (including the number of digits after the decimal place for decimal fields).&lt;br&gt;For example 123.45 requires a decimal field length of 5, and 123456 requires an integer field length of 6.</string>
      </property>
@@ -107,7 +107,7 @@
     </widget>
    </item>
    <item row="5" column="1">
-    <widget class="QSpinBox" name="mPrec">
+    <widget class="QgsSpinBox" name="mPrec">
      <property name="toolTip">
       <string>Maximum number of digits after the decimal place. For example 123.45 requires a field precision of 2.</string>
      </property>
@@ -135,6 +135,13 @@
    </item>
   </layout>
  </widget>
+ <customwidgets>
+  <customwidget>
+   <class>QgsSpinBox</class>
+   <extends>QSpinBox</extends>
+   <header>qgsspinbox.h</header>
+  </customwidget>
+ </customwidgets>
  <layoutdefault spacing="6" margin="11"/>
  <tabstops>
   <tabstop>mNameEdit</tabstop>
diff --git a/src/ui/qgsaddtaborgroupbase.ui b/src/ui/qgsaddtaborgroupbase.ui
index 72b2899ed05..a6db482e049 100644
--- a/src/ui/qgsaddtaborgroupbase.ui
+++ b/src/ui/qgsaddtaborgroupbase.ui
@@ -89,7 +89,7 @@
     </widget>
    </item>
    <item row="1" column="1">
-    <widget class="QSpinBox" name="mColumnCountSpinBox">
+    <widget class="QgsSpinBox" name="mColumnCountSpinBox">
      <property name="minimum">
       <number>1</number>
      </property>
@@ -110,6 +110,13 @@
    </item>
   </layout>
  </widget>
+ <customwidgets>
+  <customwidget>
+   <class>QgsSpinBox</class>
+   <extends>QSpinBox</extends>
+   <header>qgsspinbox.h</header>
+  </customwidget>
+ </customwidgets>
  <tabstops>
   <tabstop>mName</tabstop>
   <tabstop>mTabButton</tabstop>
diff --git a/src/ui/qgscolorrampshaderwidgetbase.ui b/src/ui/qgscolorrampshaderwidgetbase.ui
index cf1f0c390af..13c8cf1041c 100644
--- a/src/ui/qgscolorrampshaderwidgetbase.ui
+++ b/src/ui/qgscolorrampshaderwidgetbase.ui
@@ -227,7 +227,7 @@
       </widget>
      </item>
      <item>
-      <widget class="QSpinBox" name="mNumberOfEntriesSpinBox">
+      <widget class="QgsSpinBox" name="mNumberOfEntriesSpinBox">
        <property name="sizePolicy">
         <sizepolicy hsizetype="Fixed" vsizetype="Fixed">
          <horstretch>0</horstretch>
@@ -267,6 +267,11 @@
   </layout>
  </widget>
  <customwidgets>
+  <customwidget>
+   <class>QgsSpinBox</class>
+   <extends>QSpinBox</extends>
+   <header>qgsspinbox.h</header>
+  </customwidget>
   <customwidget>
    <class>QgsColorRampButton</class>
    <extends>QToolButton</extends>
diff --git a/src/ui/qgscompoundcolorwidget.ui b/src/ui/qgscompoundcolorwidget.ui
index 979c2ed3e93..b23d000a4f0 100644
--- a/src/ui/qgscompoundcolorwidget.ui
+++ b/src/ui/qgscompoundcolorwidget.ui
@@ -186,7 +186,7 @@
             </widget>
            </item>
            <item>
-            <widget class="QSpinBox" name="mSpinBoxRadius">
+            <widget class="QgsSpinBox" name="mSpinBoxRadius">
              <property name="suffix">
               <string> px</string>
              </property>
@@ -942,6 +942,11 @@
   </action>
  </widget>
  <customwidgets>
+  <customwidget>
+   <class>QgsSpinBox</class>
+   <extends>QSpinBox</extends>
+   <header>qgsspinbox.h</header>
+  </customwidget>
   <customwidget>
    <class>QgsColorButton</class>
    <extends>QToolButton</extends>
diff --git a/src/ui/qgsdecorationgriddialog.ui b/src/ui/qgsdecorationgriddialog.ui
index dc65d1884e0..800892a44b5 100644
--- a/src/ui/qgsdecorationgriddialog.ui
+++ b/src/ui/qgsdecorationgriddialog.ui
@@ -249,7 +249,7 @@
           <enum>QLayout::SetMinimumSize</enum>
          </property>
          <item row="3" column="1">
-          <widget class="QSpinBox" name="mCoordinatePrecisionSpinBox"/>
+          <widget class="QgsSpinBox" name="mCoordinatePrecisionSpinBox"/>
          </item>
          <item row="2" column="1">
           <widget class="QgsDoubleSpinBox" name="mDistanceToMapFrameSpinBox"/>
@@ -349,6 +349,11 @@
   </layout>
  </widget>
  <customwidgets>
+  <customwidget>
+   <class>QgsSpinBox</class>
+   <extends>QSpinBox</extends>
+   <header>qgsspinbox.h</header>
+  </customwidget>
   <customwidget>
    <class>QgsDoubleSpinBox</class>
    <extends>QDoubleSpinBox</extends>
diff --git a/src/ui/qgsdecorationnortharrowdialog.ui b/src/ui/qgsdecorationnortharrowdialog.ui
index 2761128354a..a7effa14cda 100644
--- a/src/ui/qgsdecorationnortharrowdialog.ui
+++ b/src/ui/qgsdecorationnortharrowdialog.ui
@@ -315,7 +315,7 @@
          </widget>
         </item>
         <item>
-         <widget class="QSpinBox" name="spinAngle">
+         <widget class="QgsSpinBox" name="spinAngle">
           <property name="maximum">
            <number>360</number>
           </property>
diff --git a/src/ui/qgsfieldcalculatorbase.ui b/src/ui/qgsfieldcalculatorbase.ui
index 83a68506ad7..b715ff659ff 100644
--- a/src/ui/qgsfieldcalculatorbase.ui
+++ b/src/ui/qgsfieldcalculatorbase.ui
@@ -168,7 +168,7 @@
        <number>3</number>
       </property>
       <item row="5" column="3">
-       <widget class="QSpinBox" name="mOutputFieldPrecisionSpinBox">
+       <widget class="QgsSpinBox" name="mOutputFieldPrecisionSpinBox">
         <property name="toolTip">
          <string>Maximum number of digits after the decimal place. For example 123.45 requires a field precision of 2.</string>
         </property>
@@ -204,7 +204,7 @@
        <widget class="QComboBox" name="mOutputFieldTypeComboBox"/>
       </item>
       <item row="5" column="1">
-       <widget class="QSpinBox" name="mOutputFieldWidthSpinBox">
+       <widget class="QgsSpinBox" name="mOutputFieldWidthSpinBox">
         <property name="toolTip">
          <string>Total length of field (including the number of digits after the decimal place for decimal fields).&lt;br&gt;For example 123.45 requires a decimal field length of 5, and 123456 requires an integer field length of 6.</string>
         </property>
@@ -258,6 +258,11 @@
   </layout>
  </widget>
  <customwidgets>
+  <customwidget>
+   <class>QgsSpinBox</class>
+   <extends>QSpinBox</extends>
+   <header>qgsspinbox.h</header>
+  </customwidget>
   <customwidget>
    <class>QgsExpressionBuilderWidget</class>
    <extends>QWidget</extends>
diff --git a/src/ui/qgsgpsinformationwidgetbase.ui b/src/ui/qgsgpsinformationwidgetbase.ui
index 0cf4861c86e..0f97f2abd3f 100644
--- a/src/ui/qgsgpsinformationwidgetbase.ui
+++ b/src/ui/qgsgpsinformationwidgetbase.ui
@@ -915,7 +915,7 @@ gray = no data
                   </widget>
                  </item>
                  <item row="1" column="1">
-                  <widget class="QSpinBox" name="mSpinTrackWidth">
+                  <widget class="QgsSpinBox" name="mSpinTrackWidth">
                    <property name="toolTip">
                     <string>Track width in pixels</string>
                    </property>
@@ -1007,7 +1007,7 @@ gray = no data
                   <widget class="QComboBox" name="mCboTimeZones"/>
                  </item>
                  <item row="4" column="1">
-                  <widget class="QSpinBox" name="mLeapSeconds"/>
+                  <widget class="QgsSpinBox" name="mLeapSeconds"/>
                  </item>
                  <item row="4" column="0">
                   <widget class="QCheckBox" name="mCbxLeapSeconds">
@@ -1056,7 +1056,7 @@ gray = no data
                  <number>20</number>
                 </property>
                 <item>
-                 <widget class="QSpinBox" name="mSpinMapExtentMultiplier">
+                 <widget class="QgsSpinBox" name="mSpinMapExtentMultiplier">
                   <property name="enabled">
                    <bool>false</bool>
                   </property>
diff --git a/src/ui/qgsgraduatedsymbolrendererwidget.ui b/src/ui/qgsgraduatedsymbolrendererwidget.ui
index 7d2f3295f6b..8a06d327aed 100644
--- a/src/ui/qgsgraduatedsymbolrendererwidget.ui
+++ b/src/ui/qgsgraduatedsymbolrendererwidget.ui
@@ -181,7 +181,7 @@ Use &quot;%1&quot; for the lower bound of the classification, and &quot;%2&quot;
       </widget>
      </item>
      <item>
-      <widget class="QSpinBox" name="spinPrecision">
+      <widget class="QgsSpinBox" name="spinPrecision">
        <property name="sizePolicy">
         <sizepolicy hsizetype="Minimum" vsizetype="Fixed">
          <horstretch>0</horstretch>
diff --git a/src/ui/qgshistogramwidgetbase.ui b/src/ui/qgshistogramwidgetbase.ui
index c81df1b54e0..8b4c3101e12 100644
--- a/src/ui/qgshistogramwidgetbase.ui
+++ b/src/ui/qgshistogramwidgetbase.ui
@@ -50,7 +50,7 @@
     </widget>
    </item>
    <item row="2" column="2">
-    <widget class="QSpinBox" name="mBinsSpinBox">
+    <widget class="QgsSpinBox" name="mBinsSpinBox">
      <property name="minimum">
       <number>1</number>
      </property>
@@ -79,6 +79,11 @@
   </layout>
  </widget>
  <customwidgets>
+  <customwidget>
+   <class>QgsSpinBox</class>
+   <extends>QSpinBox</extends>
+   <header>qgsspinbox.h</header>
+  </customwidget>
   <customwidget>
    <class>QwtPlot</class>
    <extends>QFrame</extends>
diff --git a/src/ui/qgslimitedrandomcolorrampwidgetbase.ui b/src/ui/qgslimitedrandomcolorrampwidgetbase.ui
index edaa776ffc1..39e5f2f8808 100644
--- a/src/ui/qgslimitedrandomcolorrampwidgetbase.ui
+++ b/src/ui/qgslimitedrandomcolorrampwidgetbase.ui
@@ -24,7 +24,7 @@
       </widget>
      </item>
      <item row="0" column="1">
-      <widget class="QSpinBox" name="spinHue1">
+      <widget class="QgsSpinBox" name="spinHue1">
        <property name="maximum">
         <number>359</number>
        </property>
@@ -38,7 +38,7 @@
       </widget>
      </item>
      <item row="0" column="3">
-      <widget class="QSpinBox" name="spinHue2">
+      <widget class="QgsSpinBox" name="spinHue2">
        <property name="maximum">
         <number>359</number>
        </property>
@@ -48,7 +48,7 @@
       </widget>
      </item>
      <item row="1" column="1">
-      <widget class="QSpinBox" name="spinSat1">
+      <widget class="QgsSpinBox" name="spinSat1">
        <property name="maximum">
         <number>255</number>
        </property>
@@ -69,7 +69,7 @@
       </widget>
      </item>
      <item row="1" column="3">
-      <widget class="QSpinBox" name="spinSat2">
+      <widget class="QgsSpinBox" name="spinSat2">
        <property name="maximum">
         <number>255</number>
        </property>
@@ -79,7 +79,7 @@
       </widget>
      </item>
      <item row="2" column="1">
-      <widget class="QSpinBox" name="spinVal1">
+      <widget class="QgsSpinBox" name="spinVal1">
        <property name="maximum">
         <number>255</number>
        </property>
@@ -100,7 +100,7 @@
       </widget>
      </item>
      <item row="2" column="3">
-      <widget class="QSpinBox" name="spinVal2">
+      <widget class="QgsSpinBox" name="spinVal2">
        <property name="maximum">
         <number>255</number>
        </property>
@@ -117,7 +117,7 @@
       </widget>
      </item>
      <item row="3" column="1">
-      <widget class="QSpinBox" name="spinCount">
+      <widget class="QgsSpinBox" name="spinCount">
        <property name="minimum">
         <number>1</number>
        </property>
@@ -166,6 +166,11 @@
   </layout>
  </widget>
  <customwidgets>
+  <customwidget>
+   <class>QgsSpinBox</class>
+   <extends>QSpinBox</extends>
+   <header>qgsspinbox.h</header>
+  </customwidget>
   <customwidget>
    <class>QgsPanelWidget</class>
    <extends>QWidget</extends>
diff --git a/src/ui/qgsoffsetuserinputwidget.ui b/src/ui/qgsoffsetuserinputwidget.ui
index 13df219f579..ebbfba8a552 100644
--- a/src/ui/qgsoffsetuserinputwidget.ui
+++ b/src/ui/qgsoffsetuserinputwidget.ui
@@ -102,7 +102,7 @@
        </widget>
       </item>
       <item row="0" column="3">
-       <widget class="QSpinBox" name="mQuadrantSpinBox">
+       <widget class="QgsSpinBox" name="mQuadrantSpinBox">
         <property name="minimum">
          <number>1</number>
         </property>
@@ -149,6 +149,11 @@
    <extends>QDoubleSpinBox</extends>
    <header>qgsdoublespinbox.h</header>
   </customwidget>
+  <customwidget>
+   <class>QgsSpinBox</class>
+   <extends>QSpinBox</extends>
+   <header>qgsspinbox.h</header>
+  </customwidget>
  </customwidgets>
  <resources>
   <include location="../../images/images.qrc"/>
diff --git a/src/ui/qgsoptionsbase.ui b/src/ui/qgsoptionsbase.ui
index a60c0696f57..3ff82ce829f 100644
--- a/src/ui/qgsoptionsbase.ui
+++ b/src/ui/qgsoptionsbase.ui
@@ -634,7 +634,7 @@
                      </widget>
                     </item>
                     <item>
-                     <widget class="QSpinBox" name="spinFontSize">
+                     <widget class="QgsSpinBox" name="spinFontSize">
                       <property name="sizePolicy">
                        <sizepolicy hsizetype="Maximum" vsizetype="Fixed">
                         <horstretch>0</horstretch>
@@ -677,7 +677,7 @@
                      </spacer>
                     </item>
                     <item>
-                     <widget class="QSpinBox" name="mMessageTimeoutSpnBx">
+                     <widget class="QgsSpinBox" name="mMessageTimeoutSpnBx">
                       <property name="suffix">
                        <string> s</string>
                       </property>
@@ -1980,7 +1980,7 @@
                   <item row="5" column="1">
                    <layout class="QHBoxLayout" name="horizontalLayout_10">
                     <item>
-                     <widget class="QSpinBox" name="spinBoxAttrTableRowCache">
+                     <widget class="QgsSpinBox" name="spinBoxAttrTableRowCache">
                       <property name="minimum">
                        <number>0</number>
                       </property>
@@ -2357,7 +2357,7 @@
                      </widget>
                     </item>
                     <item>
-                     <widget class="QSpinBox" name="spinMaxThreads"/>
+                     <widget class="QgsSpinBox" name="spinMaxThreads"/>
                     </item>
                     <item>
                      <spacer name="horizontalSpacer_41">
@@ -2384,7 +2384,7 @@
                      </widget>
                     </item>
                     <item>
-                     <widget class="QSpinBox" name="spinMapUpdateInterval">
+                     <widget class="QgsSpinBox" name="spinMapUpdateInterval">
                       <property name="suffix">
                        <string> ms</string>
                       </property>
@@ -2665,7 +2665,7 @@
                         </widget>
                        </item>
                        <item>
-                        <widget class="QSpinBox" name="spnRed"/>
+                        <widget class="QgsSpinBox" name="spnRed"/>
                        </item>
                        <item>
                         <widget class="QLabel" name="label_23">
@@ -2675,7 +2675,7 @@
                         </widget>
                        </item>
                        <item>
-                        <widget class="QSpinBox" name="spnGreen"/>
+                        <widget class="QgsSpinBox" name="spnGreen"/>
                        </item>
                        <item>
                         <widget class="QLabel" name="label_24">
@@ -2685,7 +2685,7 @@
                         </widget>
                        </item>
                        <item>
-                        <widget class="QSpinBox" name="spnBlue"/>
+                        <widget class="QgsSpinBox" name="spnBlue"/>
                        </item>
                        <item>
                         <spacer name="horizontalSpacer_20">
@@ -3292,7 +3292,7 @@
                      </spacer>
                     </item>
                     <item>
-                     <widget class="QSpinBox" name="mLegendGraphicResolutionSpinBox">
+                     <widget class="QgsSpinBox" name="mLegendGraphicResolutionSpinBox">
                       <property name="toolTip">
                        <string extracomment="MAP_RESOLUTION or DPI value overloading getMap default value (set 0 to use default)"/>
                       </property>
@@ -3348,7 +3348,7 @@
                    </spacer>
                   </item>
                   <item>
-                   <widget class="QSpinBox" name="mMapTipsDelaySpinBox">
+                   <widget class="QgsSpinBox" name="mMapTipsDelaySpinBox">
                     <property name="toolTip">
                      <string extracomment="MAP_RESOLUTION or DPI value overloading getMap default value (set 0 to use default)"/>
                     </property>
@@ -3588,7 +3588,7 @@
                    </widget>
                   </item>
                   <item row="1" column="1">
-                   <widget class="QSpinBox" name="mDecimalPlacesSpinBox"/>
+                   <widget class="QgsSpinBox" name="mDecimalPlacesSpinBox"/>
                   </item>
                   <item row="1" column="0">
                    <widget class="QLabel" name="label_12">
@@ -4221,7 +4221,7 @@ The bigger the number, the faster zooming with the mouse wheel will be.</string>
                    </widget>
                   </item>
                   <item row="0" column="1">
-                   <widget class="QSpinBox" name="mLineWidthSpinBox">
+                   <widget class="QgsSpinBox" name="mLineWidthSpinBox">
                     <property name="toolTip">
                      <string>Line width in pixels</string>
                     </property>
@@ -4570,7 +4570,7 @@ The bigger the number, the faster zooming with the mouse wheel will be.</string>
                  </property>
                  <layout class="QGridLayout" name="gridLayout">
                   <item row="1" column="2">
-                   <widget class="QSpinBox" name="mOffsetQuadSegSpinBox"/>
+                   <widget class="QgsSpinBox" name="mOffsetQuadSegSpinBox"/>
                   </item>
                   <item row="2" column="0">
                    <widget class="QLabel" name="label_28">
@@ -4854,7 +4854,7 @@ The bigger the number, the faster zooming with the mouse wheel will be.</string>
                    </widget>
                   </item>
                   <item row="1" column="1">
-                   <widget class="QSpinBox" name="mSnapToleranceSpinBox">
+                   <widget class="QgsSpinBox" name="mSnapToleranceSpinBox">
                     <property name="suffix">
                      <string> px</string>
                     </property>
@@ -5239,7 +5239,7 @@ The bigger the number, the faster zooming with the mouse wheel will be.</string>
                      </widget>
                     </item>
                     <item>
-                     <widget class="QSpinBox" name="mNetworkTimeoutSpinBox">
+                     <widget class="QgsSpinBox" name="mNetworkTimeoutSpinBox">
                       <property name="maximum">
                        <number>100000000</number>
                       </property>
@@ -5257,7 +5257,7 @@ The bigger the number, the faster zooming with the mouse wheel will be.</string>
                      </widget>
                     </item>
                     <item>
-                     <widget class="QSpinBox" name="mDefaultCapabilitiesExpirySpinBox">
+                     <widget class="QgsSpinBox" name="mDefaultCapabilitiesExpirySpinBox">
                       <property name="maximum">
                        <number>100000000</number>
                       </property>
@@ -5275,7 +5275,7 @@ The bigger the number, the faster zooming with the mouse wheel will be.</string>
                      </widget>
                     </item>
                     <item>
-                     <widget class="QSpinBox" name="mDefaultTileExpirySpinBox">
+                     <widget class="QgsSpinBox" name="mDefaultTileExpirySpinBox">
                       <property name="maximum">
                        <number>100000000</number>
                       </property>
@@ -5293,7 +5293,7 @@ The bigger the number, the faster zooming with the mouse wheel will be.</string>
                      </widget>
                     </item>
                     <item>
-                     <widget class="QSpinBox" name="mDefaultTileMaxRetrySpinBox">
+                     <widget class="QgsSpinBox" name="mDefaultTileMaxRetrySpinBox">
                       <property name="maximum">
                        <number>100000000</number>
                       </property>
@@ -5352,7 +5352,7 @@ The bigger the number, the faster zooming with the mouse wheel will be.</string>
                        <widget class="QLineEdit" name="mCacheDirectory"/>
                       </item>
                       <item row="4" column="1">
-                       <widget class="QSpinBox" name="mCacheSize"/>
+                       <widget class="QgsSpinBox" name="mCacheSize"/>
                       </item>
                       <item row="0" column="2">
                        <widget class="QToolButton" name="mBrowseCacheDirectory">
diff --git a/src/ui/qgsprojectpropertiesbase.ui b/src/ui/qgsprojectpropertiesbase.ui
index 89dcb705b58..ae843172503 100644
--- a/src/ui/qgsprojectpropertiesbase.ui
+++ b/src/ui/qgsprojectpropertiesbase.ui
@@ -678,7 +678,7 @@
                       </widget>
                      </item>
                      <item>
-                      <widget class="QSpinBox" name="spinBoxDP">
+                      <widget class="QgsSpinBox" name="spinBoxDP">
                        <property name="toolTip">
                         <string>The number of decimal places for the manual option</string>
                        </property>
@@ -2170,7 +2170,7 @@
                      </widget>
                     </item>
                     <item>
-                     <widget class="QSpinBox" name="mWMSMaxAtlasFeaturesSpinBox">
+                     <widget class="QgsSpinBox" name="mWMSMaxAtlasFeaturesSpinBox">
                       <property name="maximum">
                        <number>9999999</number>
                       </property>
@@ -2198,7 +2198,7 @@
                      </widget>
                     </item>
                     <item>
-                     <widget class="QSpinBox" name="mWMSPrecisionSpinBox">
+                     <widget class="QgsSpinBox" name="mWMSPrecisionSpinBox">
                       <property name="minimum">
                        <number>1</number>
                       </property>
@@ -2567,7 +2567,7 @@
                      </widget>
                     </item>
                     <item>
-                     <widget class="QSpinBox" name="mWMSImageQualitySpinBox">
+                     <widget class="QgsSpinBox" name="mWMSImageQualitySpinBox">
                       <property name="minimum">
                        <number>10</number>
                       </property>
@@ -2597,7 +2597,7 @@
                      </widget>
                     </item>
                     <item>
-                     <widget class="QSpinBox" name="mWMSTileBufferSpinBox"/>
+                     <widget class="QgsSpinBox" name="mWMSTileBufferSpinBox"/>
                     </item>
                    </layout>
                   </item>
@@ -2626,7 +2626,7 @@
                      </widget>
                     </item>
                     <item>
-                     <widget class="QSpinBox" name="mWMTSMinScaleLineEdit">
+                     <widget class="QgsSpinBox" name="mWMTSMinScaleLineEdit">
                       <property name="minimum">
                        <number>1</number>
                       </property>
@@ -3166,6 +3166,11 @@
    <header>qgsopacitywidget.h</header>
    <container>1</container>
   </customwidget>
+  <customwidget>
+   <class>QgsSpinBox</class>
+   <extends>QSpinBox</extends>
+   <header>qgsspinbox.h</header>
+  </customwidget>
   <customwidget>
    <class>QgsCodeEditorPython</class>
    <extends>QWidget</extends>
diff --git a/src/ui/qgsrasterlayerpropertiesbase.ui b/src/ui/qgsrasterlayerpropertiesbase.ui
index 02498750c6e..b4c6d18d29c 100644
--- a/src/ui/qgsrasterlayerpropertiesbase.ui
+++ b/src/ui/qgsrasterlayerpropertiesbase.ui
@@ -856,7 +856,7 @@ border-radius: 2px;</string>
                    </widget>
                   </item>
                   <item row="1" column="2">
-                   <widget class="QSpinBox" name="mBrightnessSpinBox">
+                   <widget class="QgsSpinBox" name="mBrightnessSpinBox">
                     <property name="minimum">
                      <number>-255</number>
                     </property>
@@ -895,7 +895,7 @@ border-radius: 2px;</string>
                    </widget>
                   </item>
                   <item row="1" column="6">
-                   <widget class="QSpinBox" name="mContrastSpinBox">
+                   <widget class="QgsSpinBox" name="mContrastSpinBox">
                     <property name="minimum">
                      <number>-100</number>
                     </property>
@@ -974,7 +974,7 @@ border-radius: 2px;</string>
                      </widget>
                     </item>
                     <item>
-                     <widget class="QSpinBox" name="spinColorizeStrength">
+                     <widget class="QgsSpinBox" name="spinColorizeStrength">
                       <property name="suffix">
                        <string>%</string>
                       </property>
@@ -1127,7 +1127,7 @@ border-radius: 2px;</string>
                    </widget>
                   </item>
                   <item row="2" column="6">
-                   <widget class="QSpinBox" name="spinBoxSaturation">
+                   <widget class="QgsSpinBox" name="spinBoxSaturation">
                     <property name="minimum">
                      <number>-100</number>
                     </property>
@@ -2670,6 +2670,11 @@ p, li { white-space: pre-wrap; }
    <extends>QLineEdit</extends>
    <header>qgsfilterlineedit.h</header>
   </customwidget>
+  <customwidget>
+   <class>QgsSpinBox</class>
+   <extends>QSpinBox</extends>
+   <header>qgsspinbox.h</header>
+  </customwidget>
   <customwidget>
    <class>QgsOpacityWidget</class>
    <extends>QWidget</extends>
diff --git a/src/ui/qgsrendererrasterpropswidgetbase.ui b/src/ui/qgsrendererrasterpropswidgetbase.ui
index eadafe0b885..2fd30f3b2f3 100644
--- a/src/ui/qgsrendererrasterpropswidgetbase.ui
+++ b/src/ui/qgsrendererrasterpropswidgetbase.ui
@@ -144,7 +144,7 @@
               </widget>
              </item>
              <item>
-              <widget class="QSpinBox" name="spinColorizeStrength">
+              <widget class="QgsSpinBox" name="spinColorizeStrength">
                <property name="suffix">
                 <string>%</string>
                </property>
@@ -217,7 +217,7 @@
           </widget>
          </item>
          <item row="3" column="2">
-          <widget class="QSpinBox" name="mContrastSpinBox">
+          <widget class="QgsSpinBox" name="mContrastSpinBox">
            <property name="minimum">
             <number>-100</number>
            </property>
@@ -301,7 +301,7 @@
           </widget>
          </item>
          <item row="2" column="2">
-          <widget class="QSpinBox" name="spinBoxSaturation">
+          <widget class="QgsSpinBox" name="spinBoxSaturation">
            <property name="minimum">
             <number>-100</number>
            </property>
@@ -317,7 +317,7 @@
           </widget>
          </item>
          <item row="1" column="2">
-          <widget class="QSpinBox" name="mBrightnessSpinBox">
+          <widget class="QgsSpinBox" name="mBrightnessSpinBox">
            <property name="minimum">
             <number>-255</number>
            </property>
@@ -478,6 +478,11 @@
    <header>qgscolorbutton.h</header>
    <container>1</container>
   </customwidget>
+  <customwidget>
+   <class>QgsSpinBox</class>
+   <extends>QSpinBox</extends>
+   <header>qgsspinbox.h</header>
+  </customwidget>
   <customwidget>
    <class>QgsBlendModeComboBox</class>
    <extends>QComboBox</extends>
diff --git a/src/ui/qgstextannotationdialogbase.ui b/src/ui/qgstextannotationdialogbase.ui
index 4d7332a39d8..8c628057ee7 100644
--- a/src/ui/qgstextannotationdialogbase.ui
+++ b/src/ui/qgstextannotationdialogbase.ui
@@ -33,7 +33,7 @@
       </spacer>
      </item>
      <item>
-      <widget class="QSpinBox" name="mFontSizeSpinBox"/>
+      <widget class="QgsSpinBox" name="mFontSizeSpinBox"/>
      </item>
      <item>
       <widget class="QPushButton" name="mBoldPushButton">
@@ -121,6 +121,11 @@
    <extends>QToolButton</extends>
    <header>qgscolorbutton.h</header>
   </customwidget>
+  <customwidget>
+   <class>QgsSpinBox</class>
+   <extends>QSpinBox</extends>
+   <header>qgsspinbox.h</header>
+  </customwidget>
  </customwidgets>
  <tabstops>
   <tabstop>mFontComboBox</tabstop>
diff --git a/src/ui/qgsvectortileconnectiondialog.ui b/src/ui/qgsvectortileconnectiondialog.ui
index 75d83f34432..9afbb83711a 100644
--- a/src/ui/qgsvectortileconnectiondialog.ui
+++ b/src/ui/qgsvectortileconnectiondialog.ui
@@ -66,7 +66,7 @@
        </widget>
       </item>
       <item row="2" column="2">
-       <widget class="QSpinBox" name="mSpinZMin">
+       <widget class="QgsSpinBox" name="mSpinZMin">
         <property name="sizePolicy">
          <sizepolicy hsizetype="Maximum" vsizetype="Fixed">
           <horstretch>0</horstretch>
@@ -86,7 +86,7 @@
        </widget>
       </item>
       <item row="6" column="2">
-       <widget class="QSpinBox" name="mSpinZMax">
+       <widget class="QgsSpinBox" name="mSpinZMax">
         <property name="sizePolicy">
          <sizepolicy hsizetype="Maximum" vsizetype="Fixed">
           <horstretch>0</horstretch>
@@ -177,6 +177,11 @@
    <header>auth/qgsauthsettingswidget.h</header>
    <container>1</container>
   </customwidget>
+  <customwidget>
+   <class>QgsSpinBox</class>
+   <extends>QSpinBox</extends>
+   <header>qgsspinbox.h</header>
+  </customwidget>
  </customwidgets>
  <tabstops>
   <tabstop>mEditName</tabstop>
diff --git a/src/ui/raster/qgscolorrampshaderwidgetbase.ui b/src/ui/raster/qgscolorrampshaderwidgetbase.ui
index d2daf886f94..c7abb5c7685 100644
--- a/src/ui/raster/qgscolorrampshaderwidgetbase.ui
+++ b/src/ui/raster/qgscolorrampshaderwidgetbase.ui
@@ -227,7 +227,7 @@
       </widget>
      </item>
      <item>
-      <widget class="QSpinBox" name="mNumberOfEntriesSpinBox">
+      <widget class="QgsSpinBox" name="mNumberOfEntriesSpinBox">
        <property name="sizePolicy">
         <sizepolicy hsizetype="Fixed" vsizetype="Fixed">
          <horstretch>0</horstretch>
@@ -265,6 +265,11 @@ suffix</string>
   </layout>
  </widget>
  <customwidgets>
+  <customwidget>
+   <class>QgsSpinBox</class>
+   <extends>QSpinBox</extends>
+   <header>qgsspinbox.h</header>
+  </customwidget>
   <customwidget>
    <class>QgsColorRampButton</class>
    <extends>QToolButton</extends>
diff --git a/src/ui/symbollayer/widget_shapeburstfill.ui b/src/ui/symbollayer/widget_shapeburstfill.ui
index f7edd1b5032..bea08100203 100644
--- a/src/ui/symbollayer/widget_shapeburstfill.ui
+++ b/src/ui/symbollayer/widget_shapeburstfill.ui
@@ -79,7 +79,7 @@
       </widget>
      </item>
      <item>
-      <widget class="QSpinBox" name="mSpinBlurRadius">
+      <widget class="QgsSpinBox" name="mSpinBlurRadius">
        <property name="sizePolicy">
         <sizepolicy hsizetype="Fixed" vsizetype="Fixed">
          <horstretch>1</horstretch>
@@ -458,6 +458,11 @@
    <header>qgsunitselectionwidget.h</header>
    <container>1</container>
   </customwidget>
+  <customwidget>
+   <class>QgsSpinBox</class>
+   <extends>QSpinBox</extends>
+   <header>qgsspinbox.h</header>
+  </customwidget>
   <customwidget>
    <class>QgsColorRampButton</class>
    <extends>QToolButton</extends>