diff --git a/gdk/broadway/gdkwindow-broadway.c b/gdk/broadway/gdkwindow-broadway.c
index b986697584..3518d40a49 100644
--- a/gdk/broadway/gdkwindow-broadway.c
+++ b/gdk/broadway/gdkwindow-broadway.c
@@ -819,7 +819,7 @@ gdk_window_broadway_get_geometry (GdkWindow *window,
 {
   GdkWindowImplBroadway *impl;
 
-  g_return_val_if_fail (GDK_IS_WINDOW (window), NULL);
+  g_return_if_fail (GDK_IS_WINDOW (window));
 
   impl = GDK_WINDOW_IMPL_BROADWAY (window->impl);