diff --git a/cookbook/configuration/override_dir_structure.rst b/cookbook/configuration/override_dir_structure.rst
index 0a8faad93f8..2f0382e8984 100644
--- a/cookbook/configuration/override_dir_structure.rst
+++ b/cookbook/configuration/override_dir_structure.rst
@@ -95,7 +95,7 @@ may need to modify the paths inside these files::
 Since Symfony 2.1 (in which Composer is introduced), you also need to change
 the ``extra.symfony-web-dir`` option in the ``composer.json`` file:
 
-.. code-block:: json
+.. code-block:: javascript
 
     {
         ...