diff --git a/lib/https/index.js b/lib/https/index.js
index bd334a93c..c6b5e55ae 100644
--- a/lib/https/index.js
+++ b/lib/https/index.js
@@ -83,7 +83,7 @@ function handleWebsocket(socket, wss, callback) {
 			reqEmitter.dnsTime = Date.now() - now;
 			reqEmitter.emit('send');
 			if (util.isLocalAddress(ip) && (!options.port || options.port == config.port)) {
-				return execCallback(new Error('Unable to agent to itself( ' + ip + ':' + config.port + ')')); 
+				return execCallback(new Error('Unable to agent to itself (' + ip + ':' + config.port + ')')); 
 			}
 			connect(socket, function(err, proxySocket) {
 				if (err) {