diff --git a/src/event/event.js b/src/event/event.js
index 2d9c5305..9b5feb15 100644
--- a/src/event/event.js
+++ b/src/event/event.js
@@ -14,7 +14,7 @@ jQuery.event = {
 			element = window;
 		
 		// if data is passed, bind to handler 
-		if( data != handler ) { 
+		if( data != undefined ) { 
         	// Create temporary function pointer to original handler 
 			var fn = handler;