diff --git a/gdk/quartz/gdkevents-quartz.c b/gdk/quartz/gdkevents-quartz.c
index a24ea45369..3a8d32420d 100644
--- a/gdk/quartz/gdkevents-quartz.c
+++ b/gdk/quartz/gdkevents-quartz.c
@@ -1538,7 +1538,7 @@ gdk_event_translate (GdkEvent *event,
 
       if (![NSApp isActive])
         return FALSE;
-      else if (![impl->toplevel isMainWindow])
+      else if (![impl->toplevel isKeyWindow])
         return FALSE;
     }