diff --git a/core/modules/config/src/Controller/ConfigController.php b/core/modules/config/src/Controller/ConfigController.php
index e9cef853d6..945fbb7dc5 100644
--- a/core/modules/config/src/Controller/ConfigController.php
+++ b/core/modules/config/src/Controller/ConfigController.php
@@ -202,7 +202,7 @@ public function diff($source_name, $target_name = NULL, $collection = NULL) {
           'dialog-cancel',
         ],
       ],
-      '#title' => "Back to 'Synchronize configuration' page.",
+      '#title' => $this->t("Back to 'Synchronize configuration' page."),
       '#url' => Url::fromRoute('config.sync'),
     ];