diff --git a/src/tools/mutter-mag.c b/src/tools/mutter-mag.c
index ec4891e28..b85fc5698 100644
--- a/src/tools/mutter-mag.c
+++ b/src/tools/mutter-mag.c
@@ -204,6 +204,8 @@ key_press (GtkWidget   *invisible,
       g_signal_handlers_disconnect_by_func (invisible, mouse_press, NULL);
       g_signal_handlers_disconnect_by_func (invisible, key_press, NULL);
       
+      gtk_main_quit ();
+
       return TRUE;
     }