diff --git a/lib/OpenLayers/Tile.js b/lib/OpenLayers/Tile.js
index cbc53a949a..855a4cb4f4 100644
--- a/lib/OpenLayers/Tile.js
+++ b/lib/OpenLayers/Tile.js
@@ -99,8 +99,8 @@ OpenLayers.Tile.prototype = {
     },
     
     getBoundsFromBaseLayer: function(position) {
-        var topLeft = this.layer.map.getLonLatFromLayerPx(this.position); 
-        var bottomRightPx = this.position.clone();
+        var topLeft = this.layer.map.getLonLatFromLayerPx(position); 
+        var bottomRightPx = position.clone();
         bottomRightPx.x += this.size.w;
         bottomRightPx.y += this.size.h;
         var bottomRight = this.layer.map.getLonLatFromLayerPx(bottomRightPx); 
@@ -112,7 +112,7 @@ OpenLayers.Tile.prototype = {
             } else {
                 bottomRight.lon = 180+bottomRight.lon+180;
             }        
-        }             
+        }
         bounds = new OpenLayers.Bounds(topLeft.lon, bottomRight.lat, bottomRight.lon, topLeft.lat);  
         return bounds;
     },