diff --git a/src/Bundle/ChillActivityBundle/Entity/Activity.php b/src/Bundle/ChillActivityBundle/Entity/Activity.php
index f157401a7..016c4b6fa 100644
--- a/src/Bundle/ChillActivityBundle/Entity/Activity.php
+++ b/src/Bundle/ChillActivityBundle/Entity/Activity.php
@@ -237,8 +237,9 @@ class Activity implements AccompanyingPeriodLinkedWithSocialIssuesEntityInterfac
         dump($parent);
 
         $parentKey = array_search($parent, $this->socialActions->toArray());
+        dump($parentKey);
 
-        if (null !== $parentKey) {
+        if (false !== $parentKey) {
             dump(true);
             $this->socialActions[$parentKey] = $socialAction;
             // return $this;