diff --git a/lib/OpenLayers/Layer/WFS.js b/lib/OpenLayers/Layer/WFS.js
index f7bf2cdf4a..92365cfec7 100644
--- a/lib/OpenLayers/Layer/WFS.js
+++ b/lib/OpenLayers/Layer/WFS.js
@@ -373,8 +373,9 @@ OpenLayers.Layer.WFS = OpenLayers.Class(
      *
      * Parameters:
      * newParams - {Object} 
+     * altUrl - {String} Use this as the url instead of the layer's url
      */
-    getFullRequestString:function(newParams) {
+    getFullRequestString:function(newParams, altUrl) {
         var projection = this.map.getProjection();
         this.params.SRS = (projection == "none") ? null : projection;
 
diff --git a/lib/OpenLayers/Layer/WMS.js b/lib/OpenLayers/Layer/WMS.js
index 518ab68284..ad90b723fc 100644
--- a/lib/OpenLayers/Layer/WMS.js
+++ b/lib/OpenLayers/Layer/WMS.js
@@ -202,11 +202,12 @@ OpenLayers.Layer.WMS = OpenLayers.Class(OpenLayers.Layer.Grid, {
      *
      * Parameters:
      * newParams - {Object}
+     * altUrl - {String} Use this as the url instead of the layer's url
      * 
      * Returns:
      * {String} 
      */
-    getFullRequestString:function(newParams) {
+    getFullRequestString:function(newParams, altUrl) {
         var projection = this.map.getProjection();
         this.params.SRS = (projection == "none") ? null : projection;