diff --git a/HISTORY.md b/HISTORY.md
index 4e73acf8..5a4503aa 100644
--- a/HISTORY.md
+++ b/HISTORY.md
@@ -16,6 +16,7 @@ http://visjs.org
   Timeline, deselecting selected items).
 - Fixed initial visible window in case items exceed `zoomMax`. Thanks @Remper.
 - Option `order` is now deprecated. This was needed for performance improvements.
+- Fixed an offset in newly created items when using groups.
 - Minor bug fixes.
 - More examples added.
 
diff --git a/src/timeline/Timeline.js b/src/timeline/Timeline.js
index 6ba4bb54..eef26894 100644
--- a/src/timeline/Timeline.js
+++ b/src/timeline/Timeline.js
@@ -639,7 +639,7 @@ Timeline.prototype._onAddItem = function (event) {
   }
   else {
     // add item
-    var xAbs = vis.util.getAbsoluteLeft(this.rootPanel.frame);
+    var xAbs = vis.util.getAbsoluteLeft(this.contentPanel.frame);
     var x = event.gesture.center.pageX - xAbs;
     var newItem = {
       start: this.timeAxis.snap(this._toTime(x)),