diff --git a/class/core/mw.py b/class/core/mw.py
index 9bc1b86cc..f64b1a701 100755
--- a/class/core/mw.py
+++ b/class/core/mw.py
@@ -935,7 +935,7 @@ def checkDomainPanel():
             return False
         if tmp.strip().lower() != domain.strip().lower():
             from flask import Flask, redirect, request, url_for
-            to = "http://" + domain + ":" + port
+            to = "http://" + domain + ":" + str(port)
             return redirect(to, code=302)
     return False