diff --git a/libc/kernel/common/linux/fadvise.h b/libc/kernel/common/linux/fadvise.h
index 25a0a4c..efa9e55 100644
--- a/libc/kernel/common/linux/fadvise.h
+++ b/libc/kernel/common/linux/fadvise.h
@@ -7,22 +7,29 @@
  ***   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 FADVISE_H_INCLUDED
 #define FADVISE_H_INCLUDED
-
 #define POSIX_FADV_NORMAL 0  
 #define POSIX_FADV_RANDOM 1  
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
 #define POSIX_FADV_SEQUENTIAL 2  
 #define POSIX_FADV_WILLNEED 3  
-
 #ifdef __s390x__
 #define POSIX_FADV_DONTNEED 6  
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
 #define POSIX_FADV_NOREUSE 7  
 #else
 #define POSIX_FADV_DONTNEED 4  
 #define POSIX_FADV_NOREUSE 5  
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
 #endif
-
 #endif