diff --git a/core/modules/user/user.module b/core/modules/user/user.module
index f1d3254..821159b 100644
--- a/core/modules/user/user.module
+++ b/core/modules/user/user.module
@@ -466,6 +466,7 @@ function user_access($string, $account = NULL) {
     foreach ($role_permissions as $one_role) {
       $perms += $one_role;
     }
+    drupal_alter('user_access', $perms);
     $perm[$account->uid] = $perms;
   }