diff --git a/gdk/gdkwindow.c b/gdk/gdkwindow.c
index 824d5f7447..c92abdb3c7 100644
--- a/gdk/gdkwindow.c
+++ b/gdk/gdkwindow.c
@@ -440,7 +440,7 @@ _gdk_window_has_impl (GdkWindow *window)
 static gboolean
 gdk_window_has_no_impl (GdkWindowObject *window)
 {
-  return window->impl_window;
+  return window->impl_window != window;
 }
 
 static void