diff --git a/core/modules/user/lib/Drupal/user/Form/UserPermissionsForm.php b/core/modules/user/lib/Drupal/user/Form/UserPermissionsForm.php
index 39bddd3..b14118c 100644
--- a/core/modules/user/lib/Drupal/user/Form/UserPermissionsForm.php
+++ b/core/modules/user/lib/Drupal/user/Form/UserPermissionsForm.php
@@ -108,7 +108,7 @@ public function buildForm(array $form, array &$form_state, $role_name = NULL) {
           );
           foreach ($role_names as $rid => $name) {
             // Builds arrays for checked boxes for each role
-            if (isset($role_permissions[$rid][$perm])) {
+            if (in_array($perm, $role_permissions[$rid])) {
               $status[$rid][] = $perm;
             }
           }