diff --git a/src/Symfony/Bundle/DoctrineMongoDBBundle/DependencyInjection/Configuration.php b/src/Symfony/Bundle/DoctrineMongoDBBundle/DependencyInjection/Configuration.php
index 55f0d00c8a87..4cd3704baadf 100644
--- a/src/Symfony/Bundle/DoctrineMongoDBBundle/DependencyInjection/Configuration.php
+++ b/src/Symfony/Bundle/DoctrineMongoDBBundle/DependencyInjection/Configuration.php
@@ -21,7 +21,7 @@ class Configuration
     public function getConfigTree()
     {
         $treeBuilder = new TreeBuilder();
-        $rootNode = $treeBuilder->root('doctrinemongodb', 'array');
+        $rootNode = $treeBuilder->root('doctrine_mongo_db', 'array');
 
         $this->addSingleDocumentManagerSection($rootNode);
         $this->addDocumentManagersSection($rootNode);