diff --git a/lib/OpenLayers/Events.js b/lib/OpenLayers/Events.js
index ef5bf53950..de38204103 100644
--- a/lib/OpenLayers/Events.js
+++ b/lib/OpenLayers/Events.js
@@ -319,6 +319,10 @@ OpenLayers.Events.prototype = {
     getMousePosition: function (evt) {
         if (!this.element.offsets) {
             this.element.offsets = OpenLayers.Util.pagePosition(this.element);
+            this.element.offsets[0] += (document.documentElement.scrollLeft
+                         || document.body.scrollLeft);
+            this.element.offsets[1] += (document.documentElement.scrollTop
+                         || document.body.scrollTop);
         }
         return new OpenLayers.Pixel(
             (evt.clientX + (document.documentElement.scrollLeft