diff --git a/Controllers/RedirectController.cs b/Controllers/RedirectController.cs
index 2576c3e..8bc2ca8 100644
--- a/Controllers/RedirectController.cs
+++ b/Controllers/RedirectController.cs
@@ -20,7 +20,7 @@ public class RedirectController : Controller {
 		}
 
 		var targetUrl =
-			$"https://{Vars.AuthProxySubdomain}.{dstDomain}/api/cookieproxy_stage_one?tgt={HttpUtility.UrlEncode(tgt)}";
+			$"https://{Vars.AuthProxySubdomain}.{Vars.UpstreamPrimaryDomain}/api/cookieproxy_stage_one?tgt={HttpUtility.UrlEncode(tgt)}";
 		Response.Redirect(targetUrl);
 		return Content($"Redirecting... <a href=\"{targetUrl}\">Click here if you are not redirected automatically</a>", "text/html");
 	}