diff --git a/lib/OpenLayers/Tile.js b/lib/OpenLayers/Tile.js
index 4b43603757..1fefdb2b86 100644
--- a/lib/OpenLayers/Tile.js
+++ b/lib/OpenLayers/Tile.js
@@ -10,6 +10,9 @@
 OpenLayers.Tile = Class.create();
 OpenLayers.Tile.prototype = {
     
+    /** @type OpenLayers.Grid */
+    grid: null,
+    
     // str - url of the request
     url:null,
 
@@ -23,11 +26,16 @@ OpenLayers.Tile.prototype = {
     position:null,
 
     /**
-    * @param {OpenLayers.Layer} layer
-    * @param {OpenLayers.LonLat} coord
+    * @constructor
+    *
+    * @param {OpenLayers.Grid} grid
+    * @param {OpenLayers.Bounds} bounds
+    * @param {String} url
+    * @param {OpenLayers.Size} size
     */   
-    initialize: function(bounds,url,size) {
+    initialize: function(grid, bounds, url, size) {
         if (arguments.length > 0) {
+            this.grid = grid;
             this.url = url;
             this.bounds = bounds;
             this.size = size;
diff --git a/lib/OpenLayers/Tile/Image.js b/lib/OpenLayers/Tile/Image.js
index c2fca4d584..e68355825d 100644
--- a/lib/OpenLayers/Tile/Image.js
+++ b/lib/OpenLayers/Tile/Image.js
@@ -11,11 +11,12 @@ OpenLayers.Tile.Image.prototype =
     /** 
     * @constructor
     *
+    * @param {OpenLayers.Grid} grid
     * @param {OpenLayers.Bounds} bounds
     * @param {String} url
     * @param {OpenLayers.Size} size
     */
-    initialize: function(bounds,url,size) {
+    initialize: function(grid, bounds, url, size) {
         OpenLayers.Tile.prototype.initialize.apply(this, arguments);
     },
 
diff --git a/lib/OpenLayers/Tile/WFS.js b/lib/OpenLayers/Tile/WFS.js
index eed526138a..05b99a290b 100644
--- a/lib/OpenLayers/Tile/WFS.js
+++ b/lib/OpenLayers/Tile/WFS.js
@@ -15,11 +15,12 @@ OpenLayers.Tile.WFS.prototype =
     /** 
     * @constructor
     *
+    * @param {OpenLayers.Grid} grid
     * @param {OpenLayers.Bounds} bounds
     * @param {String} url
     * @param {OpenLayers.Size} size
     */
-    initialize: function(bounds, url, size) {
+    initialize: function(grid, bounds, url, size) {
         OpenLayers.Tile.prototype.initialize.apply(this, arguments);
         
         this.features = new Array();