diff --git a/en/tutorials-and-examples/cms/authentication.rst b/en/tutorials-and-examples/cms/authentication.rst
index 5a99e695c8..1f584d4a92 100644
--- a/en/tutorials-and-examples/cms/authentication.rst
+++ b/en/tutorials-and-examples/cms/authentication.rst
@@ -61,6 +61,7 @@ add the following::
             if (strlen($password) > 0) {
                 return (new DefaultPasswordHasher())->hash($password);
             }
+            return null;
         }
     }