diff --git a/src/core/window.c b/src/core/window.c
index 918d10e4d..5a7ac628e 100644
--- a/src/core/window.c
+++ b/src/core/window.c
@@ -2812,6 +2812,21 @@ window_would_be_covered (const MetaWindow *newbie)
   return FALSE; /* none found */
 }
 
+static gboolean
+map_frame (MetaWindow *window)
+{
+  if (window->frame && !window->frame->mapped)
+    {
+      meta_topic (META_DEBUG_WINDOW_STATE,
+                  "Frame actually needs map\n");
+      window->frame->mapped = TRUE;
+      meta_ui_map_frame (window->screen->ui, window->frame->xwindow);
+      return TRUE;
+    }
+  else
+    return FALSE;
+}
+
 static gboolean
 unmap_frame (MetaWindow *window)
 {