diff --git a/cookbook/doctrine/dbal.rst b/cookbook/doctrine/dbal.rst
index 5cc468202c2..9c163c5271c 100644
--- a/cookbook/doctrine/dbal.rst
+++ b/cookbook/doctrine/dbal.rst
@@ -166,7 +166,7 @@ mapping type:
         // app/config/config.php
         $container->loadFromExtension('doctrine', array(
             'dbal' => array(
-               mapping_types' => array(
+               'mapping_types' => array(
                   'enum'  => 'string',
                ),
             ),