diff --git a/include/hostname_monitor.hpp b/include/hostname_monitor.hpp
index 4eb31f1..cf017f5 100644
--- a/include/hostname_monitor.hpp
+++ b/include/hostname_monitor.hpp
@@ -1,3 +1,5 @@
+// SPDX-License-Identifier: Apache-2.0
+// SPDX-FileCopyrightText: Copyright OpenBMC Authors
 #pragma once
 #include "dbus_singleton.hpp"
 #include "dbus_utility.hpp"