diff --git a/libc/kernel/common/linux/pn544.h b/libc/kernel/common/linux/pn544.h
index 900c373..92d7c80 100644
--- a/libc/kernel/common/linux/pn544.h
+++ b/libc/kernel/common/linux/pn544.h
@@ -7,15 +7,20 @@
  ***   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 PN544_MAGIC 0xE9
-
-#define PN544_SET_PWR _IOW(0xE9, 0x01, unsigned int)
-
+#define PN544_SET_PWR _IOW(PN544_MAGIC, 0x01, unsigned int)
 struct pn544_i2c_platform_data {
  unsigned int irq_gpio;
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
  unsigned int ven_gpio;
  unsigned int firm_gpio;
 };
-