diff --git a/menu_link_weight.module b/menu_link_weight.module
index e5c1bde..e66203e 100644
--- a/menu_link_weight.module
+++ b/menu_link_weight.module
@@ -24,8 +24,9 @@ define('MENU_LINK_WEIGHT_MAX_DELTA', 50);
  * Implements hook_form_FORM_ID_alter().
  */
 function menu_link_weight_form_node_form_alter(&$form, &$form_state) {
-  if (module_exists('menu_admin_per_menu') && function_exists('_menu_admin_per_menu_filter_parent_options') && isset($form['menu']['link']['parent']) && !user_access('administer menu') && _menu_admin_per_menu_filter_parent_options($form['menu']['link'])) {
-    // Pass.
+  if (module_exists('menu_admin_per_menu') && isset($form['menu']['link']) && !user_access('administer menu') && _menu_admin_per_menu_filter_parent_options($form['menu']['link'])) {
+    // Pass if the user does not have "administer menu" permission but does
+    // have permission through Menu Admin Per Menu.
   }
   elseif (!user_access('administer menu') || !isset($form['menu']['link'])) {
     // Only allow users with "administer menu" permissions.