diff --git a/src/gui/kernel/qplatformdialoghelper.h b/src/gui/kernel/qplatformdialoghelper.h
index 150a2333c1..1f8a7ec0a9 100644
--- a/src/gui/kernel/qplatformdialoghelper.h
+++ b/src/gui/kernel/qplatformdialoghelper.h
@@ -405,7 +405,9 @@ protected:
 
 public:
     // Keep in sync with QMessageBox Option
-    enum class Option : quint8 { DontUseNativeDialog = 0x00000001 };
+    enum class Option {
+        DontUseNativeDialog = 0x00000001,
+    };
     Q_DECLARE_FLAGS(Options, Option);
     Q_FLAG(Options);
 
diff --git a/src/widgets/dialogs/qmessagebox.h b/src/widgets/dialogs/qmessagebox.h
index 91fccd0d25..3498fb29c9 100644
--- a/src/widgets/dialogs/qmessagebox.h
+++ b/src/widgets/dialogs/qmessagebox.h
@@ -34,7 +34,7 @@ class Q_WIDGETS_EXPORT QMessageBox : public QDialog
     Q_PROPERTY(Options options READ options WRITE setOptions)
 public:
     // Keep in sync with MessageBoxOption in qplatformdialoghelper.h
-    enum class Option : quint8 {
+    enum class Option {
         DontUseNativeDialog = 0x00000001
     };
     Q_FLAG(Option)