diff --git a/libc/kernel/arch-x86/asm/ldt.h b/libc/kernel/arch-x86/asm/ldt.h
index 19b91ab..ff88760 100644
--- a/libc/kernel/arch-x86/asm/ldt.h
+++ b/libc/kernel/arch-x86/asm/ldt.h
@@ -7,35 +7,42 @@
  ***   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_X86_LDT_H
 #define _ASM_X86_LDT_H
-
 #define LDT_ENTRIES 8192
-
 #define LDT_ENTRY_SIZE 8
-
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
 #ifndef __ASSEMBLY__
-
 struct user_desc {
  unsigned int entry_number;
  unsigned int base_addr;
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
  unsigned int limit;
  unsigned int seg_32bit:1;
  unsigned int contents:2;
  unsigned int read_exec_only:1;
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
  unsigned int limit_in_pages:1;
  unsigned int seg_not_present:1;
  unsigned int useable:1;
 #ifdef __x86_64__
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
  unsigned int lm:1;
 #endif
 };
-
 #define MODIFY_LDT_CONTENTS_DATA 0
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
 #define MODIFY_LDT_CONTENTS_STACK 1
 #define MODIFY_LDT_CONTENTS_CODE 2
-
 #endif
 #endif
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */