diff --git a/cookbook/security/voters_data_permission.rst b/cookbook/security/voters_data_permission.rst
index 0e5055261e1..6e3988ca6dc 100644
--- a/cookbook/security/voters_data_permission.rst
+++ b/cookbook/security/voters_data_permission.rst
@@ -56,6 +56,8 @@ Creating the Custom Voter
 The goal is to create a voter that checks if a user has access to view or
 edit a particular object. Here's an example implementation::
 
+.. code-block:: php
+
     // src/Acme/DemoBundle/Security/Authorization/Voter/PostVoter.php
     namespace Acme\DemoBundle\Security\Authorization\Voter;