diff --git a/src/widget/downlist/combo.downlist.js b/src/widget/downlist/combo.downlist.js
index a998064c7..24c87c336 100644
--- a/src/widget/downlist/combo.downlist.js
+++ b/src/widget/downlist/combo.downlist.js
@@ -4,7 +4,7 @@
 BI.DownListCombo = BI.inherit(BI.Widget, {
     _defaultConfig: function () {
         return BI.extend(BI.DownListCombo.superclass._defaultConfig.apply(this, arguments), {
-            baseCls: "bi-down-list-combo" + (BI.isIE() ? " hack" : ""),
+            baseCls: "bi-down-list-combo",
             height: 24,
             items: [],
             adjustLength: 0,