diff --git a/src/openseadragon.js b/src/openseadragon.js
index d5688aed..34e6eb56 100644
--- a/src/openseadragon.js
+++ b/src/openseadragon.js
@@ -961,6 +961,8 @@ window.OpenSeadragon = window.OpenSeadragon || function( options ){
           } else {
             $.now = function() { return new Date().getTime(); };
           }
+
+          return $.now();
         },