diff --git a/presentation/lookAndFeel/knowledgeTree/administration/usermanagement/addUserToGroupBL.php b/presentation/lookAndFeel/knowledgeTree/administration/usermanagement/addUserToGroupBL.php
index 0b85a9d..8364c3a 100644
--- a/presentation/lookAndFeel/knowledgeTree/administration/usermanagement/addUserToGroupBL.php
+++ b/presentation/lookAndFeel/knowledgeTree/administration/usermanagement/addUserToGroupBL.php
@@ -13,6 +13,7 @@ if (checkSession()) {
     require_once("$default->fileSystemRoot/lib/visualpatterns/PatternListBox.inc");
     require_once("$default->fileSystemRoot/lib/visualpatterns/PatternCreate.inc");
     require_once("addUserToGroupUI.inc");
+    require_once("../adminUI.inc");
     require_once("$default->fileSystemRoot/lib/groups/Group.inc");
     require_once("$default->fileSystemRoot/lib/users/User.inc");
     require_once("$default->fileSystemRoot/lib/groups/GroupUserLink.inc");