diff --git a/calendar/inc/class.calendar_hooks.inc.php b/calendar/inc/class.calendar_hooks.inc.php
index fd6dffd85b..0f259c3deb 100644
--- a/calendar/inc/class.calendar_hooks.inc.php
+++ b/calendar/inc/class.calendar_hooks.inc.php
@@ -124,9 +124,9 @@ class calendar_hooks
 	static function preferences()
 	{
 		$file = array(
-			'Preferences'     => $GLOBALS['egw']->link('/index.php','menuaction=preferences.uisettings.index&appname=' . $appname),
-			'Grant Access'    => $GLOBALS['egw']->link('/index.php','menuaction=preferences.uiaclprefs.index&acl_app='.$appname),
-			'Edit Categories' => $GLOBALS['egw']->link('/index.php','menuaction=preferences.uicategories.index&cats_app='.$appname.'&cats_level=True&global_cats=True'),
+			'Preferences'     => $GLOBALS['egw']->link('/index.php','menuaction=preferences.uisettings.index&appname=calendar'),
+			'Grant Access'    => $GLOBALS['egw']->link('/index.php','menuaction=preferences.uiaclprefs.index&acl_app=calendar'),
+			'Edit Categories' => $GLOBALS['egw']->link('/index.php','menuaction=preferences.uicategories.index&cats_app=calendar&cats_level=True&global_cats=True'),
 			'Import CSV-File' => $GLOBALS['egw']->link('/calendar/csv_import.php'),
 		);
 		display_section('calendar','calendar',$file);