diff --git a/fhem/www/frontend/controls_frontend.txt b/fhem/www/frontend/controls_frontend.txt
index ebcca138f..3f85c8f6c 100644
--- a/fhem/www/frontend/controls_frontend.txt
+++ b/fhem/www/frontend/controls_frontend.txt
@@ -80,7 +80,7 @@ UPD 2013-04-09_07:08:49 26062 www/frontend/app/view/LineChartPanel.js
 UPD 2013-04-03_07:26:40 15793 www/frontend/app/view/DevicePanel.js
 UPD 2013-04-09_07:08:49 8588 www/frontend/app/view/Viewport.js
 UPD 2013-04-01_07:05:14 2476 www/frontend/app/view/TableDataGridPanel.js
-UPD 2013-04-09_07:08:13 45636 www/frontend/app/controller/ChartController.js
+UPD 2013-04-09_07:38:16 45657 www/frontend/app/controller/ChartController.js
 UPD 2013-04-09_07:08:13 13004 www/frontend/app/controller/MainController.js
 UPD 2013-04-01_07:04:35 202 www/frontend/app/model/ReadingsModel.js
 UPD 2013-04-01_07:04:36 338 www/frontend/app/model/SavedChartsModel.js
diff --git a/fhem/www/frontend/www/frontend/app/controller/ChartController.js b/fhem/www/frontend/www/frontend/app/controller/ChartController.js
index d856e5e7c..47fdf2dc3 100644
--- a/fhem/www/frontend/www/frontend/app/controller/ChartController.js
+++ b/fhem/www/frontend/www/frontend/app/controller/ChartController.js
@@ -417,7 +417,7 @@ Ext.define('FHEM.controller.ChartController', {
                       if(yaxisstepcheck) {
                           if (store.last()) {
                               var lastrec = store.last();
-                              var datetomodify = new Date(json.data[j].TIMESTAMP);
+                              var datetomodify = Ext.Date.parse(json.data[j].TIMESTAMP, "Y-m-d H:i:s");
                               var modtimestamp = Ext.Date.add(datetomodify, Ext.Date.SECOND, -1);
                               var stepitem = lastrec.copy();
                               Ext.iterate(stepitem.data, function(key, value) {