diff --git a/core/modules/system/lib/Drupal/system/DateFormatAccessController.php b/core/modules/system/lib/Drupal/system/DateFormatAccessController.php
index dff5d74..9608271 100644
--- a/core/modules/system/lib/Drupal/system/DateFormatAccessController.php
+++ b/core/modules/system/lib/Drupal/system/DateFormatAccessController.php
@@ -22,7 +22,7 @@ class DateFormatAccessController extends EntityAccessController {
   protected function checkAccess(EntityInterface $entity, $operation, $langcode, AccountInterface $account) {
     // There are no restrictions on viewing a date format.
     if ($operation == 'view') {
-      return;
+      return TRUE;
     }
     // Locked date formats cannot be updated or deleted.
     if (in_array($operation, array('update', 'delete')) && $entity->isLocked()) {