diff --git a/winixd/core/request.cpp b/winixd/core/request.cpp
index 266057d..ed2c3f5 100644
--- a/winixd/core/request.cpp
+++ b/winixd/core/request.cpp
@@ -2162,13 +2162,18 @@ void Request::AddCookie(
 
 void Request::AddDefaultSessionCookie(const std::wstring & value, pt::Date * expires)
 {
+	std::wstring * domain = &config->session_cookie_domain;
+
+	if( domain->empty() )
+		domain = &config->base_url;
+
 	AddCookie(
 		config->session_cookie_name,
 		&value,
 		nullptr,
 		expires,
 		&config->session_cookie_path,
-		&config->session_cookie_domain,
+		domain,
 		static_cast<CookieSameSite>(config->session_cookie_same_site),
 		config->session_cookie_http_only,
 		config->session_cookie_secure