diff --git a/jquery.sketchable.memento.js b/jquery.sketchable.memento.js
index f41b28c..1bbc4b2 100644
--- a/jquery.sketchable.memento.js
+++ b/jquery.sketchable.memento.js
@@ -122,7 +122,7 @@
      * @return {MementoCanvas} Class instance.
      */
     this.save = function(evt) {
-      instance.handler(function(elem, data) {
+      $instance.handler(function(elem, data) {
         // With multitouch events, only the first event should be used to store a snapshot.
         // Then, the subsequent multitouch events must update current strokes data.
         if (evt && evt.identifier > 0) {