diff --git a/Controller/SingleTaskController.php b/Controller/SingleTaskController.php
index 54a584182..68f847268 100644
--- a/Controller/SingleTaskController.php
+++ b/Controller/SingleTaskController.php
@@ -540,11 +540,13 @@ class SingleTaskController extends Controller
 
         $form->handleRequest($request);
     
-        $event = new PrivacyEvent($person, array(
-            'element_class' => SingleTask::class,
-            'action' => 'list'
-        ));
-        $this->eventDispatcher->dispatch(PrivacyEvent::PERSON_PRIVACY_EVENT, $event);
+        if (isset($person)) {
+            $event = new PrivacyEvent($person, array(
+                'element_class' => SingleTask::class,
+                'action' => 'list'
+            ));
+            $this->eventDispatcher->dispatch(PrivacyEvent::PERSON_PRIVACY_EVENT, $event);
+        }
         
         return $this->render('ChillTaskBundle:SingleTask:index.html.twig',
             \array_merge($viewParams, [ 'form' => $form->createView() ]));