diff --git a/http/server_sent_event.hpp b/http/server_sent_event.hpp
index 72d0684..dd28705 100644
--- a/http/server_sent_event.hpp
+++ b/http/server_sent_event.hpp
@@ -1,3 +1,5 @@
+// SPDX-License-Identifier: Apache-2.0
+// SPDX-FileCopyrightText: Copyright OpenBMC Authors
 #pragma once
 #include "boost_formatters.hpp"
 #include "http_body.hpp"