diff --git a/lib/node-http-proxy/routing-proxy.js b/lib/node-http-proxy/routing-proxy.js
index e8bc0cfb7..59acaf834 100644
--- a/lib/node-http-proxy/routing-proxy.js
+++ b/lib/node-http-proxy/routing-proxy.js
@@ -52,6 +52,7 @@ var RoutingProxy = exports.RoutingProxy = function (options) {
   this.enable  = options.enable;
   this.forward = options.forward;
   this.changeOrigin = options.changeOrigin || false;
+  this.notFoundHandler = options.notFoundHandler || false;
 
   //
   // Listen for 'newListener' events so that we can bind 'proxyError'
@@ -194,8 +195,13 @@ RoutingProxy.prototype.proxyRequest = function (req, res, options) {
     //
     if (!location) {
       try {
-        res.writeHead(404);
-        res.end();
+
+        if (this.notFoundHandler) {
+          this.notFoundHandler(req, res);
+        } else {
+          res.writeHead(404);
+          res.end();
+        }
       }
       catch (er) {
         console.error("res.writeHead/res.end error: %s", er.message);