diff --git a/src/lua/endpoints/login_post.lua b/src/lua/endpoints/login_post.lua
index c8b7264..ae5b750 100644
--- a/src/lua/endpoints/login_post.lua
+++ b/src/lua/endpoints/login_post.lua
@@ -35,7 +35,7 @@ local function login_post(req)
 		local hash = sha3(todigest)
 		if hash == passhash then
 			local mysession = session.start(id)
-			local domain_no_port = config.domain:match("(.*):.*")
+			local domain_no_port = config.domain:match("(.*):.*") or config.domain
 			http_response_header(req,"set-cookie",string.format(
 				[[session=%s; SameSite=Lax; Path=/; Domain=%s; HttpOnly; Secure]],mysession,domain_no_port
 			))