diff --git a/src/qgsabout.ui b/src/qgsabout.ui
index ad2dc3caafb..f10e6ab145b 100644
--- a/src/qgsabout.ui
+++ b/src/qgsabout.ui
@@ -1,4 +1,4 @@
-<!DOCTYPE UI><UI version="3.2" stdsetdef="1">
+<!DOCTYPE UI><UI version="3.1" stdsetdef="1">
 <class>QgsAbout</class>
 <widget class="QDialog">
     <property name="name">
diff --git a/src/qgsattributeactiondialogbase.ui b/src/qgsattributeactiondialogbase.ui
index 38beb9ad1e9..328d1ab9ca8 100644
--- a/src/qgsattributeactiondialogbase.ui
+++ b/src/qgsattributeactiondialogbase.ui
@@ -1,4 +1,4 @@
-<!DOCTYPE UI><UI version="3.2" stdsetdef="1">
+<!DOCTYPE UI><UI version="3.1" stdsetdef="1">
 <class>QgsAttributeActionDialogBase</class>
 <widget class="QWidget">
     <property name="name">
diff --git a/src/qgsdlgvectorlayerpropertiesbase.ui b/src/qgsdlgvectorlayerpropertiesbase.ui
index ff51a3e82d5..061a322df8a 100644
--- a/src/qgsdlgvectorlayerpropertiesbase.ui
+++ b/src/qgsdlgvectorlayerpropertiesbase.ui
@@ -1,4 +1,4 @@
-<!DOCTYPE UI><UI version="3.2" stdsetdef="1">
+<!DOCTYPE UI><UI version="3.1" stdsetdef="1">
 <class>QgsDlgVectorLayerPropertiesBase</class>
 <widget class="QDialog">
     <property name="name">
diff --git a/src/qgsidentifyresultsbase.ui b/src/qgsidentifyresultsbase.ui
index b10c5170489..64ba368345a 100644
--- a/src/qgsidentifyresultsbase.ui
+++ b/src/qgsidentifyresultsbase.ui
@@ -1,4 +1,4 @@
-<!DOCTYPE UI><UI version="3.2" stdsetdef="1">
+<!DOCTYPE UI><UI version="3.1" stdsetdef="1">
 <class>QgsIdentifyResultsBase</class>
 <widget class="QWidget">
     <property name="name">
diff --git a/src/qgsoptionsbase.ui b/src/qgsoptionsbase.ui
index 71229d69c2e..b2f224de9fc 100644
--- a/src/qgsoptionsbase.ui
+++ b/src/qgsoptionsbase.ui
@@ -1,4 +1,4 @@
-<!DOCTYPE UI><UI version="3.2" stdsetdef="1">
+<!DOCTYPE UI><UI version="3.1" stdsetdef="1">
 <class>QgsOptionsBase</class>
 <widget class="QDialog">
     <property name="name">