diff --git a/include/str_utility.hpp b/include/str_utility.hpp
index 8ac54b9..12e51f8 100644
--- a/include/str_utility.hpp
+++ b/include/str_utility.hpp
@@ -1,3 +1,5 @@
+// SPDX-License-Identifier: Apache-2.0
+// SPDX-FileCopyrightText: Copyright OpenBMC Authors
 #pragma once
 
 #include <algorithm>