diff --git a/core/lib/Drupal/Core/Routing/UrlGenerator.php b/core/lib/Drupal/Core/Routing/UrlGenerator.php
index b9294b2158..d22cb8285a 100644
--- a/core/lib/Drupal/Core/Routing/UrlGenerator.php
+++ b/core/lib/Drupal/Core/Routing/UrlGenerator.php
@@ -431,7 +431,7 @@ protected function getRoute($name) {
   /**
    * Gets either the route name or a string based on the route object.
    *
-   * @param mixed $name
+   * @param string|\Symfony\Component\Routing\Route $name
    *   A string route name, or a serializable object.
    *
    * @return string
@@ -439,7 +439,7 @@ protected function getRoute($name) {
    *
    * @internal
    */
-  private function getRouteStringIdentifier($name, array $parameters = []) {
+  private function getRouteStringIdentifier($name) {
     if (is_scalar($name)) {
       return $name;
     }
@@ -489,7 +489,7 @@ public function supports($name) {
    */
   public function getRouteDebugMessage($name, array $parameters = []) {
     @trigger_error(__METHOD__ . '() is deprecated in drupal:10.1.0 and is removed from drupal:11.0.0. Use the route name instead. See https://www.drupal.org/node/3172303', E_USER_DEPRECATED);
-    return $this->getRouteStringIdentifier($name, $parameters);
+    return $this->getRouteStringIdentifier($name);
   }
 
 }