diff --git a/usr.sbin/acpi/acpidump/acpi.c b/usr.sbin/acpi/acpidump/acpi.c
index e3e426758025..0cc3f76ac018 100644
--- a/usr.sbin/acpi/acpidump/acpi.c
+++ b/usr.sbin/acpi/acpidump/acpi.c
@@ -4,8 +4,12 @@
  * Copyright (c) 1998 Doug Rabson
  * Copyright (c) 2000 Mitsuru IWASAKI <iwasaki@FreeBSD.org>
  * Copyright (c) 2020 Alexander Motin <mav@FreeBSD.org>
+ * Copyright (c) 2024 The FreeBSD Foundation
  * All rights reserved.
  *
+ * Portions of this software were developed by Konstantin Belousov
+ * under sponsorship from the FreeBSD Foundation.
+ *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met: