diff --git a/libc/kernel/common/linux/sfh7743.h b/libc/kernel/common/linux/sfh7743.h
index b6c363d..938cea4 100644
--- a/libc/kernel/common/linux/sfh7743.h
+++ b/libc/kernel/common/linux/sfh7743.h
@@ -7,16 +7,20 @@
  ***   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 _LINUX_SFH7743_H_
 #define _LINUX_SFH7743_H_
-
 #include <linux/ioctl.h>
-
 #define SFH7743_IO 0xA2
-
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
 #define SFH7743_IOCTL_GET_ENABLE _IOR(SFH7743_IO, 0x00, char)
 #define SFH7743_IOCTL_SET_ENABLE _IOW(SFH7743_IO, 0x01, char)
-
 #endif