diff --git a/mailer.rst b/mailer.rst
index 09d22b5b777..9f26c769d82 100644
--- a/mailer.rst
+++ b/mailer.rst
@@ -229,6 +229,7 @@ and create an :class:`Symfony\\Component\\Mime\\Email` object::
     use Symfony\Component\HttpFoundation\Response;
     use Symfony\Component\Mailer\MailerInterface;
     use Symfony\Component\Mime\Email;
+    use Symfony\Component\Routing\Annotation\Route;
 
     class MailerController extends AbstractController
     {