diff --git a/src/dlangui/widgets/appframe.d b/src/dlangui/widgets/appframe.d
index 11aeef41..7c2acd50 100644
--- a/src/dlangui/widgets/appframe.d
+++ b/src/dlangui/widgets/appframe.d
@@ -256,7 +256,7 @@ class AppFrame : VerticalLayout, MenuItemClickHandler, MenuItemActionHandler {
     }
 
     /// override to handle main menu actions
-    bool onMenuItemAction(const Action action) {
+    override bool onMenuItemAction(const Action action) {
         // default handling: dispatch action using window (first offered to focused control, then to main widget)
         return window.dispatchAction(action);
     }