diff --git a/lib/http-proxy/passes/ws-incoming.js b/lib/http-proxy/passes/ws-incoming.js
index 87f5fe1..a6ddb31 100644
--- a/lib/http-proxy/passes/ws-incoming.js
+++ b/lib/http-proxy/passes/ws-incoming.js
@@ -89,7 +89,7 @@ var passes = exports;
     );
 
     // Enable developers to modify the proxyReq before headers are sent
-    if(server) { server.emit('proxyReqWs', proxyReq, req, socket, options, head); }
+    if (server) { server.emit('proxyReqWs', proxyReq, req, socket, options, head); }
 
     // Error Handler
     proxyReq.on('error', onOutgoingError);
diff --git a/test/lib-http-proxy-test.js b/test/lib-http-proxy-test.js
index 0840382..49e8a86 100644
--- a/test/lib-http-proxy-test.js
+++ b/test/lib-http-proxy-test.js
@@ -456,7 +456,7 @@ describe('lib/http-proxy.js', function() {
         ws: true
       });
 
-      proxy.on('proxyReqWs', function(proxyReq, req, res, options) {
+      proxy.on('proxyReqWs', function(proxyReq, req, socket, options, head) {
         proxyReq.setHeader('X-Special-Proxy-Header', 'foobar');
       });