diff --git a/lib/OpenLayers/Layer/Grid.js b/lib/OpenLayers/Layer/Grid.js
index f72251a933..2221362be9 100644
--- a/lib/OpenLayers/Layer/Grid.js
+++ b/lib/OpenLayers/Layer/Grid.js
@@ -132,16 +132,16 @@ OpenLayers.Layer.Grid.prototype =
      */
     getGridBounds:function() {
         
-        var topLeftTile = this.grid[0][0];
-
         var bottom = this.grid.length - 1;
-        var right = this.grid[0].length - 1; 
-        var bottomRightTile = this.grid[bottom][right];
+        var bottomLeftTile = this.grid[bottom][0];
 
-        return new OpenLayers.Bounds(topLeftTile.bounds.left, 
-                                     bottomRightTile.bounds.bottom,
-                                     bottomRightTile.bounds.right, 
-                                     topLeftTile.bounds.top);
+        var right = this.grid[0].length - 1; 
+        var topRightTile = this.grid[0][right];
+
+        return new OpenLayers.Bounds(bottomLeftTile.bounds.left, 
+                                     bottomLeftTile.bounds.bottom,
+                                     topRightTile.bounds.right, 
+                                     topRightTile.bounds.top);
     },
     
     /**