diff --git a/include/boost_formatters.hpp b/include/boost_formatters.hpp
index 0503d59..8563698 100644
--- a/include/boost_formatters.hpp
+++ b/include/boost_formatters.hpp
@@ -1,3 +1,5 @@
+// SPDX-License-Identifier: Apache-2.0
+// SPDX-FileCopyrightText: Copyright OpenBMC Authors
 #pragma once
 
 #include <boost/system/error_code.hpp>