diff --git a/nodeaccess.module b/nodeaccess.module
--- a/nodeaccess.module
+++ b/nodeaccess.module
@@ -220,9 +220,11 @@
  * @return mixed
  */
 function nodeaccess_grants_form($form, &$form_state, $node) {
-  $form_values = $form_state['values'];
+  if (isset($form_state['values'])) {
+    $form_values = $form_state['values'];
+  }
 
-  if (!$form_values) {
+  if (!isset($form_values)) {
     $form_values = array();
     $grants = nodeaccess_get_grants($node);
     $form_values['rid'] = isset($grants['rid']) ? $grants['rid'] : array();
@@ -939,13 +941,11 @@
   $grants = array();
 
   // Load grants by roles.
-  $query = db_select('nodeaccess', 'na');
-  $query->join('role', 'r', 'r.rid = na.gid');
-  $query->join('nodeaccess_role_alias', 'nra', 'nra.rid = r.rid');
+  $query = db_select('role', 'r');
+  $query->leftJoin('nodeaccess', 'na', 'r.rid = na.gid AND na.realm = :realm AND na.nid = :nid', array(':realm' => 'nodeaccess_rid', ':nid' => $node->nid));
+  $query->leftJoin('nodeaccess_role_alias', 'nra', 'nra.rid = r.rid');
   $query->fields('r', array('rid', 'name'));
   $query->fields('na', array('grant_view', 'grant_update', 'grant_delete'));
-  $query->condition('na.realm', 'nodeaccess_rid', '=');
-  $query->condition('na.nid', $node->nid, '=');
   $query->orderBy('nra.weight');
   $query->orderBy('nra.name');
   $result = $query->execute();