diff --git a/stand/kboot/include/arch/aarch64/syscall_nr.h b/stand/kboot/include/arch/aarch64/syscall_nr.h
index 83069dd8dc76..5c776db81d03 100644
--- a/stand/kboot/include/arch/aarch64/syscall_nr.h
+++ b/stand/kboot/include/arch/aarch64/syscall_nr.h
@@ -1,3 +1,7 @@
+/*
+ * This file is in the public domain.  It only recounts facts in the only way
+ * possible.
+ */
 #define SYS_close		 57
 #define	SYS_dup			 23
 #define SYS_exit		 93
diff --git a/stand/kboot/include/arch/amd64/syscall_nr.h b/stand/kboot/include/arch/amd64/syscall_nr.h
index 2cf26d7ca4dc..705b39c62f44 100644
--- a/stand/kboot/include/arch/amd64/syscall_nr.h
+++ b/stand/kboot/include/arch/amd64/syscall_nr.h
@@ -1,3 +1,7 @@
+/*
+ * This file is in the public domain.  It only recounts facts in the only way
+ * possible.
+ */
 #define SYS_close		  3
 #define	SYS_dup			 32
 #define	SYS_exit		 60
diff --git a/stand/kboot/include/arch/powerpc64/syscall_nr.h b/stand/kboot/include/arch/powerpc64/syscall_nr.h
index 735e79a09158..50946a4f058c 100644
--- a/stand/kboot/include/arch/powerpc64/syscall_nr.h
+++ b/stand/kboot/include/arch/powerpc64/syscall_nr.h
@@ -1,3 +1,7 @@
+/*
+ * This file is in the public domain.  It only recounts facts in the only way
+ * possible.
+ */
 #define SYS_close		  6
 #define	SYS_dup			 41
 #define SYS_exit		  1
diff --git a/stand/kboot/libkboot/host_syscalls.c b/stand/kboot/libkboot/host_syscalls.c
index 092ddfd133fd..551ff6b777d6 100644
--- a/stand/kboot/libkboot/host_syscalls.c
+++ b/stand/kboot/libkboot/host_syscalls.c
@@ -1,3 +1,9 @@
+/*
+ * Copyright (c) 2022-2024, Netflix, Inc.
+ *
+ * SPDX-License-Identifier: BSD-2-Clause
+ */
+
 #include "host_syscall.h"
 #include "syscall_nr.h"
 #include <stand.h>