diff --git a/core/modules/comment/lib/Drupal/comment/Controller/CommentController.php b/core/modules/comment/lib/Drupal/comment/Controller/CommentController.php
index b89b229..7189584 100644
--- a/core/modules/comment/lib/Drupal/comment/Controller/CommentController.php
+++ b/core/modules/comment/lib/Drupal/comment/Controller/CommentController.php
@@ -10,6 +10,7 @@
 use Drupal\comment\CommentInterface;
 use Drupal\comment\Plugin\Core\Entity\Comment;
 use Drupal\Core\Controller\ControllerInterface;
+use Drupal\Core\Routing\PathBasedGeneratorInterface;
 use Symfony\Component\DependencyInjection\ContainerInterface;
 use Symfony\Component\HttpFoundation\RedirectResponse;
 use Symfony\Component\HttpFoundation\Request;
@@ -23,16 +24,26 @@
 class CommentController implements ControllerInterface {
 
   /**
+   * The url generator service.
+   *
+   * @var \Drupal\Core\Routing\PathBasedGeneratorInterface
+   */
+  protected $urlGenerator;
+
+  /**
    * Constructs a CommentController object.
+   *
+   * @param \Drupal\Core\Routing\PathBasedGeneratorInterface $url_generator
+   *   The url generator service.
    */
-  public function __construct() {
+  public function __construct(PathBasedGeneratorInterface $url_generator) {
+    $this->urlGenerator = $url_generator;
   }
-
   /**
    * {@inheritdoc}
    */
   public static function create(ContainerInterface $container) {
-    return new static();
+    return new static(\Drupal::urlGenerator());
   }
 
   /**
@@ -61,7 +72,9 @@ public function commentApprove(Request $request, CommentInterface $comment) {
 
     drupal_set_message(t('Comment approved.'));
     $permalink_uri = $comment->permalink();
-    return new RedirectResponse($permalink_uri['path'], array('absolute' => TRUE));
+    $permalink_uri['options']['absolute'] = TRUE;
+    $url = $this->urlGenerator->generateFromPath($permalink_uri['path'], $permalink_uri['options']);
+    return new RedirectResponse($url);
   }
 
 }