diff --git a/core/lib/Drupal/Core/EventSubscriber/SpecialAttributesRouteSubscriber.php b/core/lib/Drupal/Core/EventSubscriber/SpecialAttributesRouteSubscriber.php
index 2d9ba76..92bee80 100644
--- a/core/lib/Drupal/Core/EventSubscriber/SpecialAttributesRouteSubscriber.php
+++ b/core/lib/Drupal/Core/EventSubscriber/SpecialAttributesRouteSubscriber.php
@@ -8,6 +8,7 @@
 namespace Drupal\Core\EventSubscriber;
 
 use Drupal\Component\Utility\String;
+use Drupal\Core\Routing\RouteBuildEvent;
 use Drupal\Core\Routing\RouteSubscriberBase;
 use Symfony\Cmf\Component\Routing\RouteObjectInterface;
 use Symfony\Component\Routing\RouteCollection;
@@ -45,4 +46,12 @@ protected function alterRoutes(RouteCollection $collection, $module) {
     return TRUE;
   }
 
+  /**
+   * {@inheritdoc}
+   */
+  public function onAlterRoutes(RouteBuildEvent $event) {
+    $collection = $event->getRouteCollection();
+    return $this->alterRoutes($collection, $event->getModule());
+  }
+
 }
diff --git a/core/tests/Drupal/Tests/Core/EventSubscriber/SpecialAttributesRouteSubscriberTest.php b/core/tests/Drupal/Tests/Core/EventSubscriber/SpecialAttributesRouteSubscriberTest.php
index 7555768..f003327 100644
--- a/core/tests/Drupal/Tests/Core/EventSubscriber/SpecialAttributesRouteSubscriberTest.php
+++ b/core/tests/Drupal/Tests/Core/EventSubscriber/SpecialAttributesRouteSubscriberTest.php
@@ -84,7 +84,7 @@ public function providerTestOnRouteBuildingValidVariables() {
   }
 
   /**
-   * Tests the onRouteBuilding method for valid variables.
+   * Tests the onAlterRoutes method for valid variables.
    *
    * @param \Symfony\Component\Routing\Route $route
    *   The route to check.
@@ -95,11 +95,11 @@ public function testOnRouteBuildingValidVariables(Route $route) {
     $route_collection = new RouteCollection();
     $route_collection->add('test', $route);
     $event = new RouteBuildEvent($route_collection, 'test');
-    $this->assertTrue($this->specialAttributesRouteSubscriber->onRouteBuilding($event));
+    $this->assertTrue($this->specialAttributesRouteSubscriber->onAlterRoutes($event));
   }
 
   /**
-   * Tests the onRouteBuilding method for invalid variables.
+   * Tests the onAlterRoutes method for invalid variables.
    *
    * @param \Symfony\Component\Routing\Route $route
    *   The route to check.
@@ -110,7 +110,7 @@ public function testOnRouteBuildingInvalidVariables(Route $route) {
     $route_collection = new RouteCollection();
     $route_collection->add('test', $route);
     $event = new RouteBuildEvent($route_collection, 'test');
-    $this->assertFalse($this->specialAttributesRouteSubscriber->onRouteBuilding($event));
+    $this->assertFalse($this->specialAttributesRouteSubscriber->onAlterRoutes($event));
   }
 
 }