diff --git a/arch/x86_64/include/multiboot2.h b/arch/x86_64/include/multiboot2.h
index be90fe1ad2..bd6a0008c8 100644
--- a/arch/x86_64/include/multiboot2.h
+++ b/arch/x86_64/include/multiboot2.h
@@ -1,7 +1,9 @@
 /****************************************************************************
  * arch/x86_64/include/multiboot2.h
  *
- * Copyright (C) 1999,2003,2007,2008,2009,2010 Free Software Foundation, Inc.
+ * SPDX-License-Identifier: MIT
+ * SPDX-FileCopyrightText: 2008,2009,2010 Free Software Foundation, Inc.
+ * SPDX-FileCopyrightText: 1999,2003,2007 Free Software Foundation, Inc.
  *
  * Permission is hereby granted, free of charge, to any person obtaining a
  * copy of this software and associated documentation files (the "Software"),