diff --git a/lib/OpenLayers/Layer/WMS/Untiled.js b/lib/OpenLayers/Layer/WMS/Untiled.js
index 0fb934b486..04ab36fccd 100644
--- a/lib/OpenLayers/Layer/WMS/Untiled.js
+++ b/lib/OpenLayers/Layer/WMS/Untiled.js
@@ -92,7 +92,9 @@ OpenLayers.Layer.WMS.Untiled.prototype =
         obj = OpenLayers.Layer.HTTPRequest.prototype.clone.apply(this, [obj]);
 
         // copy/set any non-init, non-simple values here
-
+        
+        obj.tile = null;
+        
         return obj;
     },