diff --git a/src/case/button/switch.js b/src/case/button/switch.js
index 2cfbf8839..1ca2bd2b6 100644
--- a/src/case/button/switch.js
+++ b/src/case/button/switch.js
@@ -77,7 +77,7 @@ BI.Switch = BI.inherit(BI.BasicButton, {
 
     doClick: function () {
         BI.Switch.superclass.doClick.apply(this, arguments);
-        this.fireEvent(BI.Switch.EVENT_CHANGE);
+        this.fireEvent(BI.Switch.EVENT_CHANGE, this.isSelected());
     }
 });
 BI.Switch.EVENT_CHANGE = "EVENT_CHANGE";