diff --git a/core/modules/taxonomy/taxonomy.module b/core/modules/taxonomy/taxonomy.module
index 489f301..240c585 100644
--- a/core/modules/taxonomy/taxonomy.module
+++ b/core/modules/taxonomy/taxonomy.module
@@ -18,7 +18,6 @@
 use Drupal\taxonomy\Entity\Vocabulary;
 use Drupal\taxonomy\VocabularyInterface;
 use Drupal\Component\Utility\String;
-use Symfony\Cmf\Component\Routing\RouteObjectInterface;
 
 /**
  * Denotes that no term in the vocabulary has a parent.
@@ -130,9 +129,9 @@ function taxonomy_term_uri($term) {
  * Implements hook_page_build().
  */
 function taxonomy_page_build(&$page) {
-  $request = \Drupal::request();
-  if ($request->attributes->get(RouteObjectInterface::ROUTE_NAME) == 'taxonomy.term_page') {
-    $term = $request->attributes->get('taxonomy_term');
+  $route_match = \Drupal::routeMatch();
+  if ($route_match->getRouteName() == 'taxonomy.term_page') {
+    $term = $route_match->getParameter('taxonomy_term');
     foreach ($term->uriRelationships() as $rel) {
       // Set the term path as the canonical URL to prevent duplicate content.
       $page['#attached']['drupal_add_html_head_link'][] = array(