diff --git a/docs/en/reference/working-with-associations.rst b/docs/en/reference/working-with-associations.rst
index d1d7b4265..e3a148913 100644
--- a/docs/en/reference/working-with-associations.rst
+++ b/docs/en/reference/working-with-associations.rst
@@ -495,6 +495,7 @@ association, you can now create a user and persist their comments as follows:
     $user = new User();
     $myFirstComment = new Comment();
     $user->addComment($myFirstComment);
+    $myFirstComment->setUser($user);
     
     $em->persist($user);
     $em->flush();