diff --git a/gdk/gdkdisplay.c b/gdk/gdkdisplay.c
index 5e2fa873eb..9e638dceec 100644
--- a/gdk/gdkdisplay.c
+++ b/gdk/gdkdisplay.c
@@ -2692,9 +2692,20 @@ gdk_display_get_monitor_at_window (GdkDisplay *display,
   int n_monitors, i;
   int area = 0;
   GdkMonitor *best = NULL;
+  GdkWindowImplClass *impl_class;
+  GdkDisplayClass *class;
 
   g_return_val_if_fail (GDK_IS_DISPLAY (display), NULL);
 
+  class = GDK_DISPLAY_GET_CLASS (display);
+  if (class->get_monitor_at_window)
+    {
+      best = class->get_monitor_at_window (display, window);
+
+      if (best)
+        return best;
+    }
+
   gdk_window_get_geometry (window, &win.x, &win.y, &win.width, &win.height);
   gdk_window_get_origin (window, &win.x, &win.y);
 
diff --git a/gdk/gdkdisplayprivate.h b/gdk/gdkdisplayprivate.h
index c8bc7124f8..4b5a009480 100644
--- a/gdk/gdkdisplayprivate.h
+++ b/gdk/gdkdisplayprivate.h
@@ -246,6 +246,8 @@ struct _GdkDisplayClass
   GdkMonitor *           (*get_monitor)                (GdkDisplay     *display,
                                                         int             index);
   GdkMonitor *           (*get_primary_monitor)        (GdkDisplay     *display);
+  GdkMonitor *           (*get_monitor_at_window)      (GdkDisplay     *display,
+                                                        GdkWindow      *window);
 
   /* Signals */
   void                   (*opened)                     (GdkDisplay     *display);