diff --git a/python/gui/auto_generated/symbology/qgsstylemanagerdialog.sip.in b/python/gui/auto_generated/symbology/qgsstylemanagerdialog.sip.in
index 65001eb60a3..16e90373f1c 100644
--- a/python/gui/auto_generated/symbology/qgsstylemanagerdialog.sip.in
+++ b/python/gui/auto_generated/symbology/qgsstylemanagerdialog.sip.in
@@ -14,7 +14,7 @@ class QgsStyleManagerDialog : QDialog
 {
 %Docstring
 
-A dialog allowing users to customise and populate a QgsStyle.
+A dialog allowing users to customize and populate a QgsStyle.
 %End
 
 %TypeHeaderCode
diff --git a/src/gui/symbology/qgsstylemanagerdialog.h b/src/gui/symbology/qgsstylemanagerdialog.h
index 71a734489ca..0a6c7a0b2c2 100644
--- a/src/gui/symbology/qgsstylemanagerdialog.h
+++ b/src/gui/symbology/qgsstylemanagerdialog.h
@@ -31,7 +31,7 @@ class QgsStyle;
  * \ingroup gui
  * \class QgsStyleManagerDialog
  *
- * A dialog allowing users to customise and populate a QgsStyle.
+ * A dialog allowing users to customize and populate a QgsStyle.
  */
 class GUI_EXPORT QgsStyleManagerDialog : public QDialog, private Ui::QgsStyleManagerDialogBase
 {