diff --git a/src/plugins/user-activity-events/client.js b/src/plugins/user-activity-events/client.js
index <HASH>..<HASH> 100644
--- a/src/plugins/user-activity-events/client.js
+++ b/src/plugins/user-activity-events/client.js
@@ -7,7 +7,7 @@ function throttle(fn) {
 		var context = this;

 		//only fire the event if it has been at least 10 seconds since previous fire

 		var threshhold = 10000;

-		var now = +new Date();

+		var now = (new Date()).getTime();

 		if (last && now < last + threshhold) {

 			// hold on to it

 			clearTimeout(deferTimer);
use explicit getTime rather than confusing shorthand +new Date()