diff --git a/core/modules/aggregator/aggregator.routing.yml b/core/modules/aggregator/aggregator.routing.yml
index fda0865aea9e337978996e759bbbebd95c43d6ab..007a01034b460a2476f4c21d51b5c841e603648b 100644
--- a/core/modules/aggregator/aggregator.routing.yml
+++ b/core/modules/aggregator/aggregator.routing.yml
@@ -96,10 +96,9 @@ aggregator.sources:
     _permission: 'access news feeds'
 
 aggregator.opml_page:
-  path: '/aggregator/opml/{cid}'
+  path: '/aggregator/opml'
   defaults:
     _title: 'OPML feed'
     _controller: '\Drupal\aggregator\Controller\AggregatorController::opmlPage'
-    cid: null
   requirements:
     _permission: 'access news feeds'
diff --git a/core/modules/aggregator/lib/Drupal/aggregator/Controller/AggregatorController.php b/core/modules/aggregator/lib/Drupal/aggregator/Controller/AggregatorController.php
index 8c25f9b8686e1f03baba87f59b93cf362205ea7c..d75a28a12c86a517c394a5a2f305469c51ef2b96 100644
--- a/core/modules/aggregator/lib/Drupal/aggregator/Controller/AggregatorController.php
+++ b/core/modules/aggregator/lib/Drupal/aggregator/Controller/AggregatorController.php
@@ -249,7 +249,7 @@ public function sources() {
    * @return \Symfony\Component\HttpFoundation\Response
    *   The response containing the OPML.
    */
-  public function opmlPage($cid = NULL) {
+  public function opmlPage() {
     $result = $this->database->query('SELECT * FROM {aggregator_feed} ORDER BY title');
 
     $feeds = $result->fetchAll();