diff --git a/socketio.js b/socketio.js
index d1fce081bb..716b37b5e6 100644
--- a/socketio.js
+++ b/socketio.js
@@ -226,21 +226,22 @@ function get_task_room(socket, task_id) {
 }
 
 function get_site_name(socket) {
-	var hostname_from_host = get_hostname(socket.request.headers.host);
-
-	if (socket.request.headers["x-frappe-site-name"]) {
-		return get_hostname(socket.request.headers["x-frappe-site-name"]);
+	if (socket.site_name) {
+		return socket.site_name;
+	} else if (socket.request.headers["x-frappe-site-name"]) {
+		socket.site_name = get_hostname(socket.request.headers["x-frappe-site-name"]);
 	} else if (
-		["localhost", "127.0.0.1"].indexOf(hostname_from_host) !== -1 &&
-		conf.default_site
+		conf.default_site &&
+		["localhost", "127.0.0.1"].indexOf(get_hostname(socket.request.headers.host)) !== -1
 	) {
 		// from currentsite.txt since host is localhost
-		return conf.default_site;
+		socket.site_name = conf.default_site;
 	} else if (socket.request.headers.origin) {
-		return get_hostname(socket.request.headers.origin);
+		socket.site_name = get_hostname(socket.request.headers.origin);
 	} else {
-		return get_hostname(socket.request.headers.host);
+		socket.site_name = get_hostname(socket.request.headers.host);
 	}
+	return socket.site_name;
 }
 
 function get_hostname(url) {