diff --git a/include/dbus_singleton.hpp b/include/dbus_singleton.hpp
index 2448636..2465c01 100644
--- a/include/dbus_singleton.hpp
+++ b/include/dbus_singleton.hpp
@@ -1,3 +1,5 @@
+// SPDX-License-Identifier: Apache-2.0
+// SPDX-FileCopyrightText: Copyright OpenBMC Authors
 #pragma once
 #include <sdbusplus/asio/connection.hpp>