diff --git a/libc/kernel/uapi/linux/timex.h b/libc/kernel/uapi/linux/timex.h
new file mode 100644
index 0000000..371d64a
--- /dev/null
+++ b/libc/kernel/uapi/linux/timex.h
@@ -0,0 +1,113 @@
+/****************************************************************************
+ ****************************************************************************
+ ***
+ ***   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 _UAPI_LINUX_TIMEX_H
+#define _UAPI_LINUX_TIMEX_H
+#include <linux/time.h>
+#define NTP_API 4
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
+struct timex {
+ unsigned int modes;
+ long offset;
+ long freq;
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
+ long maxerror;
+ long esterror;
+ int status;
+ long constant;
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
+ long precision;
+ long tolerance;
+ struct timeval time;
+ long tick;
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
+ long ppsfreq;
+ long jitter;
+ int shift;
+ long stabil;
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
+ long jitcnt;
+ long calcnt;
+ long errcnt;
+ long stbcnt;
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
+ int tai;
+ int :32; int :32; int :32; int :32;
+ int :32; int :32; int :32; int :32;
+ int :32; int :32; int :32;
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
+};
+#define ADJ_OFFSET 0x0001
+#define ADJ_FREQUENCY 0x0002
+#define ADJ_MAXERROR 0x0004
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
+#define ADJ_ESTERROR 0x0008
+#define ADJ_STATUS 0x0010
+#define ADJ_TIMECONST 0x0020
+#define ADJ_TAI 0x0080
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
+#define ADJ_SETOFFSET 0x0100
+#define ADJ_MICRO 0x1000
+#define ADJ_NANO 0x2000
+#define ADJ_TICK 0x4000
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
+#define ADJ_OFFSET_SINGLESHOT 0x8001
+#define ADJ_OFFSET_SS_READ 0xa001
+#define MOD_OFFSET ADJ_OFFSET
+#define MOD_FREQUENCY ADJ_FREQUENCY
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
+#define MOD_MAXERROR ADJ_MAXERROR
+#define MOD_ESTERROR ADJ_ESTERROR
+#define MOD_STATUS ADJ_STATUS
+#define MOD_TIMECONST ADJ_TIMECONST
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
+#define MOD_TAI ADJ_TAI
+#define MOD_MICRO ADJ_MICRO
+#define MOD_NANO ADJ_NANO
+#define STA_PLL 0x0001
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
+#define STA_PPSFREQ 0x0002
+#define STA_PPSTIME 0x0004
+#define STA_FLL 0x0008
+#define STA_INS 0x0010
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
+#define STA_DEL 0x0020
+#define STA_UNSYNC 0x0040
+#define STA_FREQHOLD 0x0080
+#define STA_PPSSIGNAL 0x0100
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
+#define STA_PPSJITTER 0x0200
+#define STA_PPSWANDER 0x0400
+#define STA_PPSERROR 0x0800
+#define STA_CLOCKERR 0x1000
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
+#define STA_NANO 0x2000
+#define STA_MODE 0x4000
+#define STA_CLK 0x8000
+#define STA_RONLY (STA_PPSSIGNAL | STA_PPSJITTER | STA_PPSWANDER |   STA_PPSERROR | STA_CLOCKERR | STA_NANO | STA_MODE | STA_CLK)
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
+#define TIME_OK 0
+#define TIME_INS 1
+#define TIME_DEL 2
+#define TIME_OOP 3
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
+#define TIME_WAIT 4
+#define TIME_ERROR 5
+#define TIME_BAD TIME_ERROR
+#endif
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */