diff --git a/en/controllers/components/authentication.rst b/en/controllers/components/authentication.rst
index 8726b340da..e4afee283f 100644
--- a/en/controllers/components/authentication.rst
+++ b/en/controllers/components/authentication.rst
@@ -244,6 +244,7 @@ authentication objects in your application or plugins. If for example
 you wanted to create an OpenID authentication object. In
 **src/Auth/OpenidAuthenticate.php** you could put the following::
 
+    namespace App\Auth;
     use Cake\Auth\BaseAuthenticate;
 
     class OpenidAuthenticate extends BaseAuthenticate