diff --git a/libc/kernel/common/linux/compiler-gcc.h b/libc/kernel/common/linux/compiler-gcc.h
index 0dd4a62..1064868 100644
--- a/libc/kernel/common/linux/compiler-gcc.h
+++ b/libc/kernel/common/linux/compiler-gcc.h
@@ -7,16 +7,23 @@
  ***   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!
+ ***
  ****************************************************************************
  ****************************************************************************/
 #define barrier() __asm__ __volatile__("": : :"memory")
-
 #define RELOC_HIDE(ptr, off)   ({ unsigned long __ptr;   __asm__ ("" : "=r"(__ptr) : "0"(ptr));   (typeof(ptr)) (__ptr + (off)); })
-
 #define inline inline __attribute__((always_inline))
 #define __inline__ __inline__ __attribute__((always_inline))
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
 #define __inline __inline __attribute__((always_inline))
 #define __deprecated __attribute__((deprecated))
 #define noinline __attribute__((noinline))
 #define __attribute_pure__ __attribute__((pure))
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
 #define __attribute_const__ __attribute__((__const__))