diff --git a/src/gui/kernel/qplatformdialoghelper.h b/src/gui/kernel/qplatformdialoghelper.h
index f58dcf17f09..64b703e5241 100644
--- a/src/gui/kernel/qplatformdialoghelper.h
+++ b/src/gui/kernel/qplatformdialoghelper.h
@@ -150,6 +150,7 @@ public:
         MacModelessLayout,
         AndroidLayout
     };
+    Q_ENUM(ButtonLayout)
 
     QPlatformDialogHelper();
     virtual ~QPlatformDialogHelper();