diff --git a/libc/kernel/common/linux/tpa2018d1.h b/libc/kernel/common/linux/tpa2018d1.h
index 4ae31fc..a5e44d2 100644
--- a/libc/kernel/common/linux/tpa2018d1.h
+++ b/libc/kernel/common/linux/tpa2018d1.h
@@ -7,27 +7,32 @@
  ***   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_TPA2018D1_H
 #define _LINUX_TPA2018D1_H
-
 #include <linux/ioctl.h>
-
 enum tpa2018d1_mode {
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
  TPA2018_MODE_OFF,
  TPA2018_MODE_PLAYBACK,
  TPA2018_MODE_RINGTONE,
  TPA2018_MODE_VOICE_CALL,
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
  TPA2018_NUM_MODES,
 };
-
 #define TPA2018_IOCTL_MAGIC 'a'
 #define TPA2018_SET_CONFIG _IOW(TPA2018_IOCTL_MAGIC, 1, unsigned)
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
 #define TPA2018_READ_CONFIG _IOR(TPA2018_IOCTL_MAGIC, 2, unsigned)
 #define TPA2018_SET_PARAM _IOW(TPA2018_IOCTL_MAGIC, 3, unsigned)
 #define TPA2018_SET_MODE _IOW(TPA2018_IOCTL_MAGIC, 4, unsigned)
-
 #endif
-
-
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */