diff --git a/libc/kernel/common/linux/ftape.h b/libc/kernel/common/linux/ftape.h
index bb1527c..105a5f3 100644
--- a/libc/kernel/common/linux/ftape.h
+++ b/libc/kernel/common/linux/ftape.h
@@ -7,45 +7,54 @@
  ***   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 _FTAPE_H
 #define _FTAPE_H
-
 #define FTAPE_VERSION "ftape v3.04d 25/11/97"
-
 #include <linux/types.h>
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
 #include <linux/mtio.h>
-
 #define FT_SECTOR(x) (x+1)  
 #define FT_SECTOR_SIZE 1024
 #define FT_SECTORS_PER_SEGMENT 32
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
 #define FT_ECC_SECTORS 3
 #define FT_SEGMENT_SIZE ((FT_SECTORS_PER_SEGMENT - FT_ECC_SECTORS) * FT_SECTOR_SIZE)
 #define FT_BUFF_SIZE (FT_SECTORS_PER_SEGMENT * FT_SECTOR_SIZE)
-
 #define FTAPE_SEL_A 0
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
 #define FTAPE_SEL_B 1
 #define FTAPE_SEL_C 2
 #define FTAPE_SEL_D 3
 #define FTAPE_SEL_MASK 3
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
 #define FTAPE_SEL(unit) ((unit) & FTAPE_SEL_MASK)
 #define FTAPE_NO_REWIND 4  
-
 typedef union {
  struct {
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
  __u8 error;
  __u8 command;
  } error;
  long space;
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
 } ft_drive_error;
 typedef union {
  struct {
  __u8 drive_status;
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
  __u8 drive_config;
  __u8 tape_status;
  } status;
  long space;
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
 } ft_drive_status;
-
 #endif