diff --git a/src/core/window-private.h b/src/core/window-private.h
index ed1b60a43..2a6c6a799 100644
--- a/src/core/window-private.h
+++ b/src/core/window-private.h
@@ -707,6 +707,9 @@ void        meta_window_get_session_geometry (MetaWindow  *window,
                                               int         *width,
                                               int         *height);
 
+gboolean    meta_window_geometry_contains_rect (MetaWindow   *window,
+                                                MtkRectangle *rect);
+
 void        meta_window_update_appears_focused (MetaWindow *window);
 
 void     meta_window_set_focused_internal (MetaWindow *window,
diff --git a/src/core/window.c b/src/core/window.c
index 3bdd2e451..198cc09cf 100644
--- a/src/core/window.c
+++ b/src/core/window.c
@@ -4281,6 +4281,14 @@ meta_window_get_session_geometry (MetaWindow  *window,
     window->size_hints.height_inc;
 }
 
+gboolean
+meta_window_geometry_contains_rect (MetaWindow   *window,
+                                    MtkRectangle *rect)
+{
+  return mtk_rectangle_contains_rect (&window->rect,
+                                      rect);
+}
+
 /**
  * meta_window_get_buffer_rect:
  * @window: a #MetaWindow