diff --git a/service_container.rst b/service_container.rst
index eef0433a3c8..ff7a60d441b 100644
--- a/service_container.rst
+++ b/service_container.rst
@@ -1434,7 +1434,7 @@ Let's say you have the following functional interface::
 You also have a service that defines many methods and one of them is the same
 ``format()`` method of the previous interface::
 
-    // src/Service/MessageFormatterInterface.php
+    // src/Service/MessageUtils.php
     namespace App\Service;
 
     class MessageUtils