diff --git a/service_container/factories.rst b/service_container/factories.rst
index bd765afb2b6..316d1cb7d44 100644
--- a/service_container/factories.rst
+++ b/service_container/factories.rst
@@ -153,6 +153,7 @@ Configuration of the service container then looks like this:
         # app/config/services.yml
 
         app.newsletter_manager:
+            class: AppBundle\Email\NewsletterManager 
             # new syntax
             factory: 'AppBundle\Email\NewsletterManagerFactory:createNewsletterManager'
             # old syntax