diff --git a/Controller/ActivityController.php b/Controller/ActivityController.php
index 8e6c25e76..8e3ff7958 100644
--- a/Controller/ActivityController.php
+++ b/Controller/ActivityController.php
@@ -22,6 +22,7 @@
 
 namespace Chill\ActivityBundle\Controller;
 
+use Chill\MainBundle\Security\Authorization\AuthorizationHelper;
 use Chill\PersonBundle\Privacy\PrivacyEvent;
 use Symfony\Component\EventDispatcher\EventDispatcherInterface;
 use Symfony\Component\HttpFoundation\Request;
@@ -44,14 +45,21 @@ class ActivityController extends Controller
      */
     protected $eventDispatcher;
     
+    /**
+     * @var AuthorizationHelper
+     */
+    protected $authorizationHelper;
+    
     /**
      * ActivityController constructor.
      *
      * @param EventDispatcherInterface $eventDispatcher
+     * @param AuthorizationHelper $authorizationHelper
      */
-    public function __construct(EventDispatcherInterface $eventDispatcher)
+    public function __construct(EventDispatcherInterface $eventDispatcher, AuthorizationHelper $authorizationHelper)
     {
         $this->eventDispatcher = $eventDispatcher;
+        $this->authorizationHelper = $authorizationHelper;
     }
     
     /**
@@ -69,7 +77,7 @@ class ActivityController extends Controller
 
         $this->denyAccessUnlessGranted('CHILL_PERSON_SEE', $person);
 
-        $reachableScopes = $this->get('chill.main.security.authorization.helper')
+        $reachableScopes = $this->authorizationHelper
             ->getReachableScopes($this->getUser(), new Role('CHILL_ACTIVITY_SEE'),
             $person->getCenter());
 
diff --git a/Resources/config/services/controller.yml b/Resources/config/services/controller.yml
index 075c52679..a1930760b 100644
--- a/Resources/config/services/controller.yml
+++ b/Resources/config/services/controller.yml
@@ -2,4 +2,5 @@ services:
     Chill\ActivityBundle\Controller\ActivityController:
         arguments:
             $eventDispatcher: '@Symfony\Component\EventDispatcher\EventDispatcherInterface'
+            $authorizationHelper: '@Chill\MainBundle\Security\Authorization\AuthorizationHelper'
         tags: ['controller.service_arguments']