diff --git a/html/ops/add_user.php b/html/ops/add_user.php
index a62568fc09..f0050aea33 100755
--- a/html/ops/add_user.php
+++ b/html/ops/add_user.php
@@ -2,6 +2,7 @@
 
 require_once("../inc/util_ops.inc");
 require_once("../inc/user.inc");
+require_once("../inc/user_util.inc");
 
 admin_page_head("Add User");