diff --git a/openbox/focus.c b/openbox/focus.c
index 58e9bcca..eaaba4ab 100644
--- a/openbox/focus.c
+++ b/openbox/focus.c
@@ -40,6 +40,8 @@ void focus_shutdown()
         g_list_free(focus_order[i]);
     g_free(focus_order);
 
+    XDestroyWindow(focus_backup);
+
     /* reset focus to root */
     XSetInputFocus(ob_display, PointerRoot, RevertToNone, CurrentTime);
 }