diff --git a/admin/users.php b/admin/users.php
index 217e1a2..d39a3c2 100644
--- a/admin/users.php
+++ b/admin/users.php
@@ -236,8 +236,10 @@ function insertUser(&$userdata) {
   if (empty($uids)) {
     $uid = 1;
   } else {
-    arsort($uids);
-    $uid = $uids[0] + 1;
+    foreach ($uids as $currentuid) {
+      $uid = max($uid, $currentuid);
+    }
+    $uid += 1;
   }
   $GLOBALS['namemap'][$uid] =
     array('uid' => $uid,