diff --git a/Extension/ConfigurationExtensionInterface.php b/Extension/ConfigurationExtensionInterface.php
index 6fcd9018d..51bff0801 100644
--- a/Extension/ConfigurationExtensionInterface.php
+++ b/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