diff --git a/core/modules/block/lib/Drupal/block/Controller/BlockController.php b/core/modules/block/lib/Drupal/block/Controller/BlockController.php
index ebd9bc9..7b713e4 100644
--- a/core/modules/block/lib/Drupal/block/Controller/BlockController.php
+++ b/core/modules/block/lib/Drupal/block/Controller/BlockController.php
@@ -36,7 +36,7 @@ public function demo($theme) {
             // page by path_is_admin() function in order to use the frontend
             // theme. Since JavaScript relies on a proper separation of admin
             // pages, it needs to know this is an actual administrative page.
-            'data' => array('currentPathIsAdmin' => TRUE),
+            'data' => array('path' => array('currentPathIsAdmin' => TRUE)),
             'type' => 'setting',
           )
         ),