diff --git a/gtk/gtkmenu.c b/gtk/gtkmenu.c
index 2ce078543d..3835e7300a 100644
--- a/gtk/gtkmenu.c
+++ b/gtk/gtkmenu.c
@@ -4163,40 +4163,6 @@ draw_stay_up_triangle (GdkWindow *window,
 }
 #endif
 
-static GdkRegion *
-flip_region (GdkRegion *region,
-	     gboolean   flip_x,
-	     gboolean   flip_y)
-{
-  gint n_rectangles;
-  GdkRectangle *rectangles;
-  GdkRectangle clipbox;
-  GdkRegion *new_region;
-  gint i;
-
-  new_region = gdk_region_new ();
-  
-  gdk_region_get_rectangles (region, &rectangles, &n_rectangles);
-  gdk_region_get_clipbox (region, &clipbox);
-
-  for (i = 0; i < n_rectangles; ++i)
-    {
-      GdkRectangle rect = rectangles[i];
-
-      if (flip_y)
-	rect.y -= 2 * (rect.y - clipbox.y) + rect.height;
-
-      if (flip_x)
-	rect.x -= 2 * (rect.x - clipbox.x) + rect.width;
-
-      gdk_region_union_with_rect (new_region, &rect);
-    }
-
-  g_free (rectangles);
-
-  return new_region;
-}
-
 static void
 gtk_menu_set_submenu_navigation_region (GtkMenu          *menu,
 					GtkMenuItem      *menu_item,
@@ -4228,8 +4194,6 @@ gtk_menu_set_submenu_navigation_region (GtkMenu          *menu,
   if (event->x >= 0 && event->x < width)
     {
       gint popdown_delay;
-      gboolean flip_y = FALSE;
-      gboolean flip_x = FALSE;
       
       gtk_menu_stop_navigating_submenu (menu);
 
@@ -4243,26 +4207,22 @@ gtk_menu_set_submenu_navigation_region (GtkMenu          *menu,
 	{
 	  /* left */
 	  point[0].x = event->x_root + 1;
-	  point[1].x = 2 * (event->x_root + 1) - submenu_right;
-
-	  flip_x = TRUE;
+	  point[1].x = submenu_right;
 	}
 
       if (event->y < 0)
 	{
 	  /* top */
-	  point[0].y = event->y_root + 1;
-	  point[1].y = 2 * (event->y_root + 1) - submenu_top + NAVIGATION_REGION_OVERSHOOT;
+	  point[0].y = event->y_root;
+	  point[1].y = submenu_top - NAVIGATION_REGION_OVERSHOOT;
 
-	  if (point[0].y >= point[1].y - NAVIGATION_REGION_OVERSHOOT)
+	  if (point[0].y <= submenu_top)
 	    return;
-
-	  flip_y = TRUE;
 	}
       else
 	{
 	  /* bottom */
-	  point[0].y = event->y_root;
+	  point[0].y = event->y_root + 1;
 	  point[1].y = submenu_bottom + NAVIGATION_REGION_OVERSHOOT;
 
 	  if (point[0].y >= submenu_bottom)
@@ -4274,13 +4234,6 @@ gtk_menu_set_submenu_navigation_region (GtkMenu          *menu,
 
       menu->navigation_region = gdk_region_polygon (point, 3, GDK_WINDING_RULE);
 
-      if (flip_x || flip_y)
-	{
-	  GdkRegion *new_region = flip_region (menu->navigation_region, flip_x, flip_y);
-	  gdk_region_destroy (menu->navigation_region);
-	  menu->navigation_region = new_region;
-	}
-
       g_object_get (gtk_widget_get_settings (GTK_WIDGET (menu)),
 		    "gtk-menu-popdown-delay", &popdown_delay,
 		    NULL);