diff --git a/Services/Component/classes/class.ilPlugin.php b/Services/Component/classes/class.ilPlugin.php
index 8a8e4cf22ec6..7ccf30caa436 100755
--- a/Services/Component/classes/class.ilPlugin.php
+++ b/Services/Component/classes/class.ilPlugin.php
@@ -397,7 +397,7 @@ function getTablePrefix()
 	 * Update all or selected languages
 	 * @var array|null	$a_lang_keys	keys of languages to be updated (null for all)
 	 */
-	public function updateLanguages(array $a_lang_keys = null)
+	public function updateLanguages($a_lang_keys = null)
 	{
 		ilGlobalCache::flushAll();
 		include_once("./Services/Language/classes/class.ilObjLanguage.php");