diff --git a/core/modules/config/config.routing.yml b/core/modules/config/config.routing.yml
index f77651f..3eaeb34 100644
--- a/core/modules/config/config.routing.yml
+++ b/core/modules/config/config.routing.yml
@@ -1,4 +1,4 @@
-config_diff:
+config.diff:
   path: '/admin/config/development/configuration/sync/diff/{config_file}'
   defaults:
     _content: '\Drupal\config\Controller\ConfigController::diff'