diff --git a/libc/kernel/common/asm-generic/ipc.h b/libc/kernel/common/asm-generic/ipc.h
index 57657a7..a3ba44e 100644
--- a/libc/kernel/common/asm-generic/ipc.h
+++ b/libc/kernel/common/asm-generic/ipc.h
@@ -7,31 +7,38 @@
  ***   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_GENERIC_IPC_H
 #define _ASM_GENERIC_IPC_H
-
 struct ipc_kludge {
  struct msgbuf __user *msgp;
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
  long msgtyp;
 };
-
 #define SEMOP 1
 #define SEMGET 2
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
 #define SEMCTL 3
 #define SEMTIMEDOP 4
 #define MSGSND 11
 #define MSGRCV 12
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
 #define MSGGET 13
 #define MSGCTL 14
 #define SHMAT 21
 #define SHMDT 22
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
 #define SHMGET 23
 #define SHMCTL 24
-
 #define DIPC 25
-
 #define IPCCALL(version,op) ((version)<<16 | (op))
-
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
 #endif