diff --git a/lib/OpenLayers/Layer/WMS/Untiled.js b/lib/OpenLayers/Layer/WMS/Untiled.js
index bd674eae8f..cbc94715a4 100644
--- a/lib/OpenLayers/Layer/WMS/Untiled.js
+++ b/lib/OpenLayers/Layer/WMS/Untiled.js
@@ -33,12 +33,12 @@ OpenLayers.Layer.WMS.Untiled.prototype =
     * @param {String} url
     * @param {Object} params
     */
-    initialize: function(name, url, params) {
+    initialize: function(name, url, params, options) {
         var newArguments = new Array();
         if (arguments.length > 0) {
             //uppercase params
             params = OpenLayers.Util.upperCaseObject(params);
-            newArguments.push(name, url, params);
+            newArguments.push(name, url, params, options);
         }
         OpenLayers.Layer.HTTPRequest.prototype.initialize.apply(this, 
                                                                 newArguments);