diff --git a/libc/kernel/common/linux/time.h b/libc/kernel/common/linux/time.h
index 3e6e440..00a556d 100644
--- a/libc/kernel/common/linux/time.h
+++ b/libc/kernel/common/linux/time.h
@@ -7,63 +7,68 @@
  ***   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_TIME_H
 #define _LINUX_TIME_H
-
 #include <linux/types.h>
-
 #ifndef _STRUCT_TIMESPEC
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
 #define _STRUCT_TIMESPEC
 struct timespec {
  time_t tv_sec;
  long tv_nsec;
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
 };
 #endif
-
 struct timeval {
  time_t tv_sec;
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
  suseconds_t tv_usec;
 };
-
 struct timezone {
  int tz_minuteswest;
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
  int tz_dsttime;
 };
-
 #define NFDBITS __NFDBITS
-
 #define FD_SETSIZE __FD_SETSIZE
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
 #define FD_SET(fd,fdsetp) __FD_SET(fd,fdsetp)
 #define FD_CLR(fd,fdsetp) __FD_CLR(fd,fdsetp)
 #define FD_ISSET(fd,fdsetp) __FD_ISSET(fd,fdsetp)
 #define FD_ZERO(fdsetp) __FD_ZERO(fdsetp)
-
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
 #define ITIMER_REAL 0
 #define ITIMER_VIRTUAL 1
 #define ITIMER_PROF 2
-
 struct itimerspec {
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
  struct timespec it_interval;
  struct timespec it_value;
 };
-
 struct itimerval {
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
  struct timeval it_interval;
  struct timeval it_value;
 };
-
 #define CLOCK_REALTIME 0
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
 #define CLOCK_MONOTONIC 1
 #define CLOCK_PROCESS_CPUTIME_ID 2
 #define CLOCK_THREAD_CPUTIME_ID 3
-
 #define CLOCK_SGI_CYCLE 10
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
 #define MAX_CLOCKS 16
 #define CLOCKS_MASK (CLOCK_REALTIME | CLOCK_MONOTONIC)
 #define CLOCKS_MONO CLOCK_MONOTONIC
-
 #define TIMER_ABSTIME 0x01
-
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
 #endif