diff --git a/web/app/sketcher/canvas.js b/web/app/sketcher/canvas.js
index 0f51c74c..a35774d1 100644
--- a/web/app/sketcher/canvas.js
+++ b/web/app/sketcher/canvas.js
@@ -68,7 +68,6 @@ TCAD.TWO.Viewer = function(canvas) {
   
   this.canvas = canvas;
   this.io = new TCAD.IO(this);
-  this.historyManager = new TCAD.HistoryManager(this);
   var viewer = this;
   this.retinaPxielRatio = window.devicePixelRatio > 1 ? window.devicePixelRatio : 1;
   function updateCanvasSize() {
@@ -107,6 +106,7 @@ TCAD.TWO.Viewer = function(canvas) {
   
   this._setupServiceLayer();
 
+  this.historyManager = new TCAD.HistoryManager(this);
   this.refresh();
 };
 
diff --git a/web/app/sketcher/history.js b/web/app/sketcher/history.js
index d4bd1c0b..89dc368b 100644
--- a/web/app/sketcher/history.js
+++ b/web/app/sketcher/history.js
@@ -2,9 +2,7 @@
 TCAD.HistoryManager = function(viewer) {
   this.viewer = viewer;
   this.dmp = new diff_match_patch();
-  this.historyPointer = -1;
-  this.diffs = [];
-  this._counter = 0;
+  this.init(this.viewer.io.serializeSketch());
 };