diff --git a/gpioMon.hpp b/gpioMon.hpp
index 2add08c..2d68891 100644
--- a/gpioMon.hpp
+++ b/gpioMon.hpp
@@ -1,3 +1,6 @@
+// SPDX-License-Identifier: Apache-2.0
+// SPDX-FileCopyrightText: Copyright OpenBMC Authors
+
 #pragma once
 
 #include <gpiod.h>