diff --git a/conf/zpush/backend_caldav.php b/conf/zpush/backend_caldav.php
index 0d24bdc..7bddded 100644
--- a/conf/zpush/backend_caldav.php
+++ b/conf/zpush/backend_caldav.php
@@ -10,7 +10,7 @@ define('CALDAV_SERVER', 'localhost');
 define('CALDAV_PORT', '443');
 define('CALDAV_PATH', '/caldav/calendars/%u/');
 define('CALDAV_PERSONAL', 'PRINCIPAL');
-define('CALDAV_SUPPORTS_SYNC', true);
+define('CALDAV_SUPPORTS_SYNC', false);
 define('CALDAV_MAX_SYNC_PERIOD', 2147483647);
 
 ?>