diff --git a/libc/kernel/common/linux/zconf.h b/libc/kernel/common/linux/zconf.h
index 18ea78c..8534969 100644
--- a/libc/kernel/common/linux/zconf.h
+++ b/libc/kernel/common/linux/zconf.h
@@ -7,32 +7,38 @@
  ***   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 _ZCONF_H
 #define _ZCONF_H
-
 #ifndef MAX_MEM_LEVEL
 #define MAX_MEM_LEVEL 8
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
 #endif
-
 #ifndef MAX_WBITS
 #define MAX_WBITS 15  
 #endif
-
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
 #ifndef DEF_WBITS
 #define DEF_WBITS MAX_WBITS
 #endif
-
 #if MAX_MEM_LEVEL >= 8
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
 #define DEF_MEM_LEVEL 8
 #else
 #define DEF_MEM_LEVEL MAX_MEM_LEVEL
 #endif
-
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
 typedef unsigned char Byte;
 typedef unsigned int uInt;
 typedef unsigned long uLong;
 typedef void *voidp;
-
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
 #endif