diff --git a/src/base/combination/group.button.js b/src/base/combination/group.button.js
index ed4f9d680..b9e8f7127 100644
--- a/src/base/combination/group.button.js
+++ b/src/base/combination/group.button.js
@@ -236,7 +236,7 @@ BI.ButtonGroup = BI.inherit(BI.Widget, {
     setValueMap: function (map) {
         map = map || {};
         BI.each(this.buttons, function (i, item) {
-            if (BI.isNotNull(map[item.getValue()])) {
+            if (BI.has(map, item.getValue())) {
                 item.setSelected && item.setSelected(true);
             } else {
                 item.setSelected && item.setSelected(false);