diff --git a/controller.rst b/controller.rst
index 7866a97818b..6dc2bea4f88 100644
--- a/controller.rst
+++ b/controller.rst
@@ -178,7 +178,8 @@ These are used for rendering templates, sending emails, querying the database an
 any other "work" you can think of.
 
 If you need a service in a controller, type-hint an argument with its class
-(or interface) name. Symfony will automatically pass you the service you need::
+(or interface) name. Symfony will automatically pass you the service you need.
+Make sure to :doc:`register the controller as a service or tag it with 'controller.service_arguments' </controller/service>`::
 
     use Psr\Log\LoggerInterface;
     use Symfony\Component\HttpFoundation\Response;