diff --git a/core/modules/comment/lib/Drupal/comment/CommentBreadcrumbBuilder.php b/core/modules/comment/lib/Drupal/comment/CommentBreadcrumbBuilder.php
index 00b0538..caf7913 100644
--- a/core/modules/comment/lib/Drupal/comment/CommentBreadcrumbBuilder.php
+++ b/core/modules/comment/lib/Drupal/comment/CommentBreadcrumbBuilder.php
@@ -9,6 +9,7 @@
 
 use Drupal\Core\Breadcrumb\BreadcrumbBuilderInterface;
 use Drupal\Core\StringTranslation\TranslationManager;
+use Symfony\Cmf\Component\Routing\RouteObjectInterface;
 
 /**
  * Class to define the comment breadcrumb builder.
@@ -36,7 +37,7 @@ public function __construct(TranslationManager $translation) {
    * {@inheritdoc}
    */
   public function build(array $attributes) {
-    if (isset($attributes['_route']) && $attributes['_route'] == 'comment_reply' && isset($attributes['node'])) {
+    if ($attributes[RouteObjectInterface::ROUTE_NAME] == 'comment_reply' && isset($attributes['node'])) {
       $node = $attributes['node'];
       $uri = $node->uri();
       $breadcrumb[] = l($this->translation->translate('Home'), NULL);