diff --git a/simple_access.module b/simple_access.module
index 0d6250f..f4ba91b 100644
--- a/simple_access.module
+++ b/simple_access.module
@@ -348,7 +348,9 @@ function simple_access_node_access_records($node) {
  */
 function simple_access_node_grants($account, $op) {
   $gids = simple_access_groups_from_roles(array_keys($account->roles));
-  $grants['simple_access'] = array_keys($gids);
+  if (!empty($gids)) {
+    $grants['simple_access'] = array_keys($gids);
+  }
 
   if (in_array($op, array('view', 'update', 'delete')) && !empty($gids)) {
     $pids = db_select('simple_access_profiles_access', 'p')