diff --git a/help.php b/help.php
index 9456c856d18..6f3cc99fcc5 100644
--- a/help.php
+++ b/help.php
@@ -32,7 +32,7 @@ require_once(dirname(__FILE__) . '/config.php');
 
 $identifier = required_param('identifier', PARAM_STRINGID);
 $component  = required_param('component', PARAM_SAFEDIR);
-$lang       = required_param('component', PARAM_LANG); // TODO: maybe split into separate scripts
+$lang       = required_param('lang', PARAM_LANG); // TODO: maybe split into separate scripts
 $ajax       = optional_param('ajax', 0, PARAM_BOOL);
 
 if (!$lang) {