diff --git a/core/lib/Drupal/Core/Access/DefaultAccessCheck.php b/core/lib/Drupal/Core/Access/DefaultAccessCheck.php
index 60112d6..47a1b8c 100644
--- a/core/lib/Drupal/Core/Access/DefaultAccessCheck.php
+++ b/core/lib/Drupal/Core/Access/DefaultAccessCheck.php
@@ -20,7 +20,7 @@ class DefaultAccessCheck implements AccessCheckInterface {
    */
   public function applies(Route $route) {
     // The route will either fold to boolean true or false, so just return that.
-    return (boolean) $route->getRequirement('_access');
+    return array_key_exists('_access', $route->getRequirements());
   }
 
   /**
diff --git a/core/lib/Drupal/Core/Access/PermissionAccessCheck.php b/core/lib/Drupal/Core/Access/PermissionAccessCheck.php
index c6e6775..ee3768b 100644
--- a/core/lib/Drupal/Core/Access/PermissionAccessCheck.php
+++ b/core/lib/Drupal/Core/Access/PermissionAccessCheck.php
@@ -19,7 +19,7 @@ class PermissionAccessCheck implements AccessCheckInterface {
    * Implements AccessCheckInterface::applies().
    */
   public function applies(Route $route) {
-    return (boolean) $route->getRequirement('_permission');
+    return array_key_exists('_permission', $route->getRequirements());
   }
 
   /**