diff --git a/libc/kernel/common/asm-generic/bug.h b/libc/kernel/common/asm-generic/bug.h
index d91a135..19460a7 100644
--- a/libc/kernel/common/asm-generic/bug.h
+++ b/libc/kernel/common/asm-generic/bug.h
@@ -7,27 +7,30 @@
  ***   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_GENERIC_BUG_H
 #define _ASM_GENERIC_BUG_H
-
 #include <linux/compiler.h>
-
 #ifndef HAVE_ARCH_BUG
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
 #define BUG()
 #endif
-
 #ifndef HAVE_ARCH_BUG_ON
 #define BUG_ON(condition) do { if (condition) ; } while(0)
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
 #endif
-
 #ifndef HAVE_ARCH_WARN_ON
 #define WARN_ON(condition) do { if (condition) ; } while(0)
 #endif
-
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
 #define WARN_ON_ONCE(condition)  ({   static int __warn_once = 1;   int __ret = 0;     if (unlikely((condition) && __warn_once)) {   __warn_once = 0;   WARN_ON(1);   __ret = 1;   }   __ret;  })
-
 #define WARN_ON_SMP(x) do { } while (0)
-
 #endif