diff --git a/gtk/gtkwindowhandle.c b/gtk/gtkwindowhandle.c
index b1494043f2..d0ba7fe424 100644
--- a/gtk/gtkwindowhandle.c
+++ b/gtk/gtkwindowhandle.c
@@ -343,7 +343,7 @@ perform_titlebar_action (GtkWindowHandle *self,
       gesture = GDK_TITLEBAR_GESTURE_RIGHT_CLICK;
       break;
     default:
-      break;
+      return FALSE;
     }
 
   if (gdk_toplevel_titlebar_gesture (GDK_TOPLEVEL (surface), gesture))