diff --git a/src/core/platform/web/config.js b/src/core/platform/web/config.js
index bcbf6caa4..eeda344b0 100644
--- a/src/core/platform/web/config.js
+++ b/src/core/platform/web/config.js
@@ -53,7 +53,7 @@ BI.prepares.push(function () {
             return BI.extend({}, ob, {
                 horizontalAlign: BI.HorizontalAlign.Stretch,
                 type: "bi.vertical",
-                items: BI.map(ob.items, function (item) {
+                items: BI.map(ob.items, function (i, item) {
                     return {
                         type: "bi.inline",
                         horizontalAlign: ob.horizontalAlign,