diff --git a/lib/http-proxy/passes/web-incoming.js b/lib/http-proxy/passes/web-incoming.js
index 2b14c874c..305365f7a 100644
--- a/lib/http-proxy/passes/web-incoming.js
+++ b/lib/http-proxy/passes/web-incoming.js
@@ -117,7 +117,7 @@ web_o = Object.keys(web_o).map(function(pass) {
     (options.buffer || req).pipe(proxyReq);
 
     proxyReq.on('response', function(proxyRes) {
-      server.emit('proxyRes', proxyRes);
+      if(server) { server.emit('proxyRes', proxyRes); }
       for(var i=0; i < web_o.length; i++) {
        if(web_o[i](req, res, proxyRes)) { break; }
       }