diff -u b/acl.module b/acl.module
--- b/acl.module
+++ b/acl.module
@@ -317,6 +317,7 @@
   static $loaded = array();
 
   if (!isset($loaded[$type])) {
+    module_load_include($type, 'acl');
     $loaded[$type] = drupal_get_path('module', 'acl') . "/acl.$type";
   }
   return $loaded[$type];