diff --git a/lib/OpenLayers/Format/XML.js b/lib/OpenLayers/Format/XML.js
index 7dbdcd46cb..4379a6e466 100644
--- a/lib/OpenLayers/Format/XML.js
+++ b/lib/OpenLayers/Format/XML.js
@@ -500,7 +500,7 @@ OpenLayers.Format.XML = OpenLayers.Class(OpenLayers.Format, {
         var value = options.value;
         if(value != null) {
             if(typeof value == "boolean") {
-                value = encodeURIComponent(value);
+                value = String(value);
             }
             node.appendChild(this.createTextNode(value));
         }