diff --git a/src/event.js b/src/event.js
index ee3606fe4c..92fe0cb3d0 100644
--- a/src/event.js
+++ b/src/event.js
@@ -63,7 +63,7 @@ jQuery.event = {
 			elemData.handle = eventHandle = function( e ) {
 				// Discard the second event of a jQuery.event.trigger() and
 				// when an event is called after a page has unloaded
-				return typeof jQuery !== "undefined" && jQuery.event.triggered !== e.type ?
+				return typeof jQuery !== "undefined" && (!e || jQuery.event.triggered !== e.type) ?
 					jQuery.event.handle.apply( eventHandle.elem, arguments ) :
 					undefined;
 			};