diff --git a/src/Composer/Config/ConfigSourceInterface.php b/src/Composer/Config/ConfigSourceInterface.php
index a00e989bb..0bd4faaa0 100644
--- a/src/Composer/Config/ConfigSourceInterface.php
+++ b/src/Composer/Config/ConfigSourceInterface.php
@@ -23,8 +23,8 @@ interface ConfigSourceInterface
     /**
      * Add a repository
      *
-     * @param string $name   Name
-     * @param array  $config Configuration
+     * @param string      $name   Name
+     * @param array|false $config Configuration
      */
     public function addRepository($name, $config);