diff --git a/presentation/lookAndFeel/knowledgeTree/administration/usermanagement/editUserGroupsBL.php b/presentation/lookAndFeel/knowledgeTree/administration/usermanagement/editUserGroupsBL.php
index 21eff8e..6e83844 100644
--- a/presentation/lookAndFeel/knowledgeTree/administration/usermanagement/editUserGroupsBL.php
+++ b/presentation/lookAndFeel/knowledgeTree/administration/usermanagement/editUserGroupsBL.php
@@ -27,7 +27,7 @@
  
 require_once("../../../../../config/dmsDefaults.php");
 
-KTUtil::extractGPC('fAssign', 'fUserID', 'fUserSet');
+KTUtil::extractGPC('fAssign', 'fUserID', 'fUserSet', 'groupAddedLeft', 'groupAddedRight');
 
 /*
  * Update all User/Groups association