diff --git a/core/lib/Drupal/Core/Access/AccessManager.php b/core/lib/Drupal/Core/Access/AccessManager.php
index 9a4681b..c86168e 100644
--- a/core/lib/Drupal/Core/Access/AccessManager.php
+++ b/core/lib/Drupal/Core/Access/AccessManager.php
@@ -8,6 +8,7 @@
 namespace Drupal\Core\Access;
 
 use Drupal\Core\ParamConverter\ParamConverterManager;
+use Drupal\Core\Routing\Access\AccessInterface as RoutingAccessInterface;
 use Drupal\Core\Routing\RequestHelper;
 use Drupal\Core\Routing\RouteProviderInterface;
 use Drupal\Core\Session\AccountInterface;
@@ -336,7 +337,13 @@ protected function loadCheck($service_id) {
       throw new \InvalidArgumentException(sprintf('No check has been registered for %s', $service_id));
     }
 
-    $this->checks[$service_id] = $this->container->get($service_id);
+    $check = $this->container->get($service_id);
+
+    if (!($check instanceof RoutingAccessInterface)) {
+      throw new AccessException('All access checks must implement AccessInterface.');
+    }
+
+    $this->checks[$service_id] = $check;
   }
 
   /**