diff --git a/src/Bundle/ChillActivityBundle/Controller/ActivityController.php b/src/Bundle/ChillActivityBundle/Controller/ActivityController.php
index c7908fcaf..d76bffe80 100644
--- a/src/Bundle/ChillActivityBundle/Controller/ActivityController.php
+++ b/src/Bundle/ChillActivityBundle/Controller/ActivityController.php
@@ -359,6 +359,7 @@ final class ActivityController extends AbstractController
 
         if ($person instanceof Person) {
             $entity->setPerson($person);
+            $entity->getPersons()->add($person);
         }
 
         if ($accompanyingPeriod instanceof AccompanyingPeriod) {