diff --git a/libc/kernel/arch-x86/asm/ipcbuf.h b/libc/kernel/arch-x86/asm/ipcbuf.h
index 32342c1..83dc12f 100644
--- a/libc/kernel/arch-x86/asm/ipcbuf.h
+++ b/libc/kernel/arch-x86/asm/ipcbuf.h
@@ -7,24 +7,33 @@
  ***   structures, and macros generated from the original header, and thus,
  ***   contains no copyrightable information.
  ***
+ ***   To edit the content of this header, modify the corresponding
+ ***   source file (e.g. under external/kernel-headers/original/) then
+ ***   run bionic/libc/kernel/tools/update_all.py
+ ***
+ ***   Any manual change here will be lost the next time this script will
+ ***   be run. You've been warned!
+ ***
  ****************************************************************************
  ****************************************************************************/
 #ifndef _ASM_X86_IPCBUF_H
 #define _ASM_X86_IPCBUF_H
-
 struct ipc64_perm
 {
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
  __kernel_key_t key;
  __kernel_uid32_t uid;
  __kernel_gid32_t gid;
  __kernel_uid32_t cuid;
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
  __kernel_gid32_t cgid;
  __kernel_mode_t mode;
  unsigned short __pad1;
  unsigned short seq;
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
  unsigned short __pad2;
  unsigned long __unused1;
  unsigned long __unused2;
 };
-
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
 #endif