diff --git a/phpgwapi/inc/horde/Horde/SyncML.php b/phpgwapi/inc/horde/Horde/SyncML.php
index 97e04d67bb..1525855b45 100644
--- a/phpgwapi/inc/horde/Horde/SyncML.php
+++ b/phpgwapi/inc/horde/Horde/SyncML.php
@@ -150,7 +150,7 @@ class Horde_SyncML_SyncMLHdr extends Horde_SyncML_ContentHandler {
     {
         // Remove any existing session since we'll be contructing a
         // custom session id.
-		//session_regenerate_id();
+		session_regenerate_id();
         session_destroy();
 
 		// we need to (re-)load the eGW session-handler, as session_destroy unloads custom session-handlers