diff --git a/libc/kernel/uapi/linux/patchkey.h b/libc/kernel/uapi/linux/patchkey.h
new file mode 100644
index 0000000..d1da267
--- /dev/null
+++ b/libc/kernel/uapi/linux/patchkey.h
@@ -0,0 +1,38 @@
+/****************************************************************************
+ ****************************************************************************
+ ***
+ ***   This header was automatically generated from a Linux kernel header
+ ***   of the same name, to make information necessary for userspace to
+ ***   call into the kernel available to libc.  It contains only constants,
+ ***   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 _LINUX_PATCHKEY_H_INDIRECT
+#error "patchkey.h included directly"
+#endif
+#ifndef _UAPI_LINUX_PATCHKEY_H
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
+#define _UAPI_LINUX_PATCHKEY_H
+#include <endian.h>
+#ifdef __BYTE_ORDER
+#if __BYTE_ORDER == __BIG_ENDIAN
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
+#define _PATCHKEY(id) (0xfd00|id)
+#elif __BYTE_ORDER == __LITTLE_ENDIAN
+#define _PATCHKEY(id) ((id<<8)|0x00fd)
+#else
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
+#error "could not determine byte order"
+#endif
+#endif
+#endif
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */