diff --git a/libc/kernel/common/linux/elf-em.h b/libc/kernel/common/linux/elf-em.h
index e151fdf..766dd14 100644
--- a/libc/kernel/common/linux/elf-em.h
+++ b/libc/kernel/common/linux/elf-em.h
@@ -7,45 +7,52 @@
  ***   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_ELF_EM_H
 #define _LINUX_ELF_EM_H
-
 #define EM_NONE 0
 #define EM_M32 1
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
 #define EM_SPARC 2
 #define EM_386 3
 #define EM_68K 4
 #define EM_88K 5
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
 #define EM_486 6  
 #define EM_860 7
 #define EM_MIPS 8  
-
 #define EM_MIPS_RS3_LE 10  
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
 #define EM_MIPS_RS4_BE 10  
-
 #define EM_PARISC 15  
 #define EM_SPARC32PLUS 18  
 #define EM_PPC 20  
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
 #define EM_PPC64 21  
 #define EM_SH 42  
 #define EM_SPARCV9 43  
 #define EM_IA_64 50  
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
 #define EM_X86_64 62  
 #define EM_S390 22  
 #define EM_CRIS 76  
 #define EM_V850 87  
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
 #define EM_M32R 88  
 #define EM_H8_300 46  
 #define EM_FRV 0x5441  
-
 #define EM_ALPHA 0x9026
-
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
 #define EM_CYGNUS_V850 0x9080
-
 #define EM_CYGNUS_M32R 0x9041
-
 #define EM_S390_OLD 0xA390
-
 #endif
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */