Index: wp-includes/nav-menu.php
===================================================================
--- wp-includes/nav-menu.php	(revision 15254)
+++ wp-includes/nav-menu.php	(working copy)
@@ -505,7 +505,7 @@
 		}
 	}
 
-	return $items;
+	return apply_filters( 'wp_get_nav_menu_items',  $items, $menu, $args );
 }
 
 /**