diff --git a/koha-tmpl/intranet-tmpl/prog/en/modules/acqui/neworderempty.tt b/koha-tmpl/intranet-tmpl/prog/en/modules/acqui/neworderempty.tt
index faa2db4f32..8087554285 100644
--- a/koha-tmpl/intranet-tmpl/prog/en/modules/acqui/neworderempty.tt
+++ b/koha-tmpl/intranet-tmpl/prog/en/modules/acqui/neworderempty.tt
@@ -177,7 +177,7 @@ $(document).ready(function()
         } else {
             ids = new Array;
         }
-        if (ids.indexOf(borrowernumber) < 0) {
+        if (ids.indexOf(borrowernumber.toString()) < 0) {
             ids.push(borrowernumber);
             $("#users_ids").val(ids.join(':'));
             var li = '<li id="user_'+borrowernumber+'">'+borrowername