--- a/netwerk/test/httpserver/nsIHttpServer.idl
+++ b/netwerk/test/httpserver/nsIHttpServer.idl
@@ -486,17 +486,17 @@ interface nsIHttpRequestMetadata : nsIPr
    */
   readonly attribute nsIInputStream bodyInputStream;
 };
 
 
 /**
  * Represents an HTTP response, as described in RFC 2616, section 6.
  */
-[scriptable, uuid(4b023876-274e-41e8-83fb-e51f7aba43a6)]
+[scriptable, uuid(1acd16c2-dc59-42fa-9160-4f26c43c1c21)]
 interface nsIHttpResponse : nsISupports
 {
   /**
    * Sets the status line for this.  If this method is never called on this, the
    * status line defaults to "HTTP/", followed by the server's default HTTP
    * version (e.g. "1.1"), followed by " 200 OK".
    *
    * @param httpVersion