diff --git a/gdk/gdkwindow.c b/gdk/gdkwindow.c
index 476b7f27e4..65ee69c535 100644
--- a/gdk/gdkwindow.c
+++ b/gdk/gdkwindow.c
@@ -6415,6 +6415,8 @@ do_child_shapes (GdkWindow *window,
   if (merge && window->shape)
     cairo_region_subtract (region, window->shape);
 
+  cairo_region_xor_rectangle (region, &r);
+
   gdk_window_shape_combine_region (window, region, 0, 0);
 }
 
@@ -6536,6 +6538,8 @@ do_child_input_shapes (GdkWindow *window,
   if (merge && window->input_shape)
     cairo_region_subtract (region, window->input_shape);
 
+  cairo_region_xor_rectangle (region, &r);
+
   gdk_window_input_shape_combine_region (window, region, 0, 0);
 }