diff --git a/DependencyInjection/Configuration.php b/DependencyInjection/Configuration.php
index a0fea356..b396d7cd 100644
--- a/DependencyInjection/Configuration.php
+++ b/DependencyInjection/Configuration.php
@@ -19,6 +19,7 @@ class Configuration implements ConfigurationInterface
 {
     /**
      * {@inheritdoc}
+     * @return TreeBuilder
      */
     public function getConfigTreeBuilder()
     {