diff --git a/src/case/segment/button.segment.js b/src/case/segment/button.segment.js
index d7ef1373dc..d3bf0b2868 100644
--- a/src/case/segment/button.segment.js
+++ b/src/case/segment/button.segment.js
@@ -10,7 +10,7 @@ BI.SegmentButton = BI.inherit(BI.BasicButton, {
     _defaultConfig: function () {
         var conf = BI.SegmentButton.superclass._defaultConfig.apply(this, arguments);
         return BI.extend(conf, {
-            baseCls: (conf.baseCls || "") + " bi-segment-button bi-list-item-select2",
+            baseCls: (conf.baseCls || "") + " bi-segment-button bi-list-item-select",
             shadow: true,
             readonly: true,
             hgap: 5