diff --git a/libraries/config/ConfigFile.class.php b/libraries/config/ConfigFile.class.php
index 887440b45542..ea19fbd5b0ec 100644
--- a/libraries/config/ConfigFile.class.php
+++ b/libraries/config/ConfigFile.class.php
@@ -173,7 +173,7 @@ public function setAllowedKeys($keys)
      * {@link updateWithGlobalConfig()} or reading
      * by {@link getConfig()} or {@link getConfigArray()}
      *
-     * @param array
+     * @param array $mapping
      *
      * @return void
      */