diff --git a/lib/OpenLayers/Popup.js b/lib/OpenLayers/Popup.js
index c064e3f7a4..3d4e3e8548 100644
--- a/lib/OpenLayers/Popup.js
+++ b/lib/OpenLayers/Popup.js
@@ -19,6 +19,9 @@ OpenLayers.Popup.prototype = {
     /** reference to the parent DIV to which this popup is @type DOMElement */
     parent: null,
 
+    /** @type OpenLayers.LonLat */
+    lonlat: null,
+
     /** @type DOMElement */
     div: null,
 
@@ -42,13 +45,14 @@ OpenLayers.Popup.prototype = {
     * @constructor
     * 
     * @param {String} id
+    * @param {OpenLayers.LonLat} lonlat
     * @param {OpenLayers.Size} size
     * @param {String} contentHTML
     */
-    initialize:function(id, size, contentHTML) {
+    initialize:function(id, lonlat, size, contentHTML) {
         OpenLayers.Popup.count += 1;
-
         this.id = (id != null) ? id : "Popup" + OpenLayers.Popup.count;
+        this.lonlat = lonlat;
         this.size = (size != null) ? size : OpenLayers.Popup.SIZE;
         if (contentHTML != null) { 
              this.contentHTML = contentHTML;