diff --git a/src/Symfony/Component/DependencyInjection/Extension/ConfigurationExtensionInterface.php b/src/Symfony/Component/DependencyInjection/Extension/ConfigurationExtensionInterface.php
index 6fcd9018dc..51bff08012 100644
--- a/src/Symfony/Component/DependencyInjection/Extension/ConfigurationExtensionInterface.php
+++ b/src/Symfony/Component/DependencyInjection/Extension/ConfigurationExtensionInterface.php
@@ -24,7 +24,7 @@ interface ConfigurationExtensionInterface
     /**
      * Returns extension configuration
      *
-     * @param array            $config    $config    An array of configuration values
+     * @param array            $config    An array of configuration values
      * @param ContainerBuilder $container A ContainerBuilder instance
      *
      * @return ConfigurationInterface|null The configuration or null