diff --git a/core/modules/content_translation/src/Routing/ContentTranslationRouteSubscriber.php b/core/modules/content_translation/src/Routing/ContentTranslationRouteSubscriber.php
index 1aa35b9..a09deaa 100644
--- a/core/modules/content_translation/src/Routing/ContentTranslationRouteSubscriber.php
+++ b/core/modules/content_translation/src/Routing/ContentTranslationRouteSubscriber.php
@@ -87,8 +87,6 @@ protected function alterRoutes(RouteCollection $collection) {
         $path . '/add/{source}/{target}',
         array(
           '_controller' => '\Drupal\content_translation\Controller\ContentTranslationController::add',
-          'source' => NULL,
-          'target' => NULL,
           '_title' => 'Add',
           'entity_type_id' => $entity_type_id,