diff --git a/docs/en/reference/xml-mapping.rst b/docs/en/reference/xml-mapping.rst
index e010c93690b..4ee50b7ceb0 100644
--- a/docs/en/reference/xml-mapping.rst
+++ b/docs/en/reference/xml-mapping.rst
@@ -46,7 +46,7 @@ In order to work, this requires certain conventions:
 .. code-block:: php
 
     <?php
-    $driver->setFileExtension('.xml');
+    $driver->getLocator()->setFileExtension('.xml');
 
 It is recommended to put all XML mapping documents in a single
 folder but you can spread the documents over several folders if you