diff --git a/gdk/gdkwindowimpl.h b/gdk/gdkwindowimpl.h
index 00f2f1b13d..3a5029b016 100644
--- a/gdk/gdkwindowimpl.h
+++ b/gdk/gdkwindowimpl.h
@@ -146,6 +146,7 @@ struct _GdkWindowImplIface
   void         (* input_window_destroy) (GdkWindow       *window);
   void         (* input_window_crossing)(GdkWindow       *window,
 					 gboolean         enter);
+  gboolean     supports_native_bg;
 };
 
 /* Interface Functions */
diff --git a/gdk/x11/gdkwindow-x11.c b/gdk/x11/gdkwindow-x11.c
index a8dd83b6bc..c215e87219 100644
--- a/gdk/x11/gdkwindow-x11.c
+++ b/gdk/x11/gdkwindow-x11.c
@@ -5606,6 +5606,7 @@ gdk_window_impl_iface_init (GdkWindowImplIface *iface)
   iface->destroy = _gdk_x11_window_destroy;
   iface->input_window_destroy = _gdk_input_window_destroy;
   iface->input_window_crossing = _gdk_input_crossing_event;
+  iface->supports_native_bg = TRUE;
 }
 
 #define __GDK_WINDOW_X11_C__