diff --git a/apps/calendar/appinfo/app.php b/apps/calendar/appinfo/app.php
index 60e3c75650..b80076fadc 100644
--- a/apps/calendar/appinfo/app.php
+++ b/apps/calendar/appinfo/app.php
@@ -10,6 +10,8 @@ OC::$CLASSPATH['OC_Search_Provider_Calendar'] = 'apps/calendar/lib/search.php';
 OC_HOOK::connect('OC_User', 'post_deleteUser', 'OC_Calendar_Hooks', 'deleteUser');
 OC_Hook::connect('OC_DAV', 'initialize', 'OC_Calendar_Hooks', 'initializeCalDAV');
 OC_Util::addScript('calendar','loader');
+OC_Util::addScript("3rdparty", "chosen/chosen.jquery.min");
+OC_Util::addStyle("3rdparty", "chosen/chosen");
 OC_App::register( array(
   'order' => 10,
   'id' => 'calendar',