diff --git a/realtime/utils.js b/realtime/utils.js
index 0ff3be0a49..85df2f9157 100644
--- a/realtime/utils.js
+++ b/realtime/utils.js
@@ -1,8 +1,19 @@
+const { get_conf } = require("../node_utils");
+const conf = get_conf();
+
 function get_url(socket, path) {
 	if (!path) {
 		path = "";
 	}
-	return socket.request.headers.origin + path;
+	let url = socket.request.headers.origin;
+	if (conf.developer_mode) {
+		let [protocal, host, port] = url.split(':');
+		if (port != conf.webserver_port) {
+			port = conf.webserver_port;
+		}
+		url = `${protocal}:${host}:${port}`;
+	}
+	return url + path;
 }
 
 module.exports = {