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diff --git a/include/sys/timex.h b/include/sys/timex.h
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+/* Copyright (C) 1995, 1996, 1997, 1999 Free Software Foundation, Inc.
+ This file is part of the GNU C Library.
+
+ The GNU C Library is free software; you can redistribute it and/or
+ modify it under the terms of the GNU Library General Public License as
+ published by the Free Software Foundation; either version 2 of the
+ License, or (at your option) any later version.
+
+ The GNU C Library is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ Library General Public License for more details.
+
+ You should have received a copy of the GNU Library General Public
+ License along with the GNU C Library; see the file COPYING.LIB. If not,
+ write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
+ Boston, MA 02111-1307, USA. */
+
+#ifndef _SYS_TIMEX_H
+#define _SYS_TIMEX_H 1
+
+#include <features.h>
+#include <sys/time.h>
+
+/* These definitions from linux/timex.h as of 2.2.0. */
+
+struct ntptimeval
+{
+ struct timeval time; /* current time (ro) */
+ long int maxerror; /* maximum error (us) (ro) */
+ long int esterror; /* estimated error (us) (ro) */
+};
+
+struct timex
+{
+ unsigned int modes; /* mode selector */
+ long int offset; /* time offset (usec) */
+ long int freq; /* frequency offset (scaled ppm) */
+ long int maxerror; /* maximum error (usec) */
+ long int esterror; /* estimated error (usec) */
+ int status; /* clock command/status */
+ long int constant; /* pll time constant */
+ long int precision; /* clock precision (usec) (read only) */
+ long int tolerance; /* clock frequency tolerance (ppm) (read only) */
+ struct timeval time; /* (read only) */
+ long int tick; /* (modified) usecs between clock ticks */
+
+ long int ppsfreq; /* pps frequency (scaled ppm) (ro) */
+ long int jitter; /* pps jitter (us) (ro) */
+ int shift; /* interval duration (s) (shift) (ro) */
+ long int stabil; /* pps stability (scaled ppm) (ro) */
+ long int jitcnt; /* jitter limit exceeded (ro) */
+ long int calcnt; /* calibration intervals (ro) */
+ long int errcnt; /* calibration errors (ro) */
+ long int stbcnt; /* stability limit exceeded (ro) */
+
+ /* ??? */
+ int :32; int :32; int :32; int :32;
+ int :32; int :32; int :32; int :32;
+ int :32; int :32; int :32; int :32;
+};
+
+/* Mode codes (timex.mode) */
+#define ADJ_OFFSET 0x0001 /* time offset */
+#define ADJ_FREQUENCY 0x0002 /* frequency offset */
+#define ADJ_MAXERROR 0x0004 /* maximum time error */
+#define ADJ_ESTERROR 0x0008 /* estimated time error */
+#define ADJ_STATUS 0x0010 /* clock status */
+#define ADJ_TIMECONST 0x0020 /* pll time constant */
+#define ADJ_TICK 0x4000 /* tick value */
+#define ADJ_OFFSET_SINGLESHOT 0x8001 /* old-fashioned adjtime */
+
+/* xntp 3.4 compatibility names */
+#define MOD_OFFSET ADJ_OFFSET
+#define MOD_FREQUENCY ADJ_FREQUENCY
+#define MOD_MAXERROR ADJ_MAXERROR
+#define MOD_ESTERROR ADJ_ESTERROR
+#define MOD_STATUS ADJ_STATUS
+#define MOD_TIMECONST ADJ_TIMECONST
+#define MOD_CLKB ADJ_TICK
+#define MOD_CLKA ADJ_OFFSET_SINGLESHOT /* 0x8000 in original */
+
+
+/* Status codes (timex.status) */
+#define STA_PLL 0x0001 /* enable PLL updates (rw) */
+#define STA_PPSFREQ 0x0002 /* enable PPS freq discipline (rw) */
+#define STA_PPSTIME 0x0004 /* enable PPS time discipline (rw) */
+#define STA_FLL 0x0008 /* select frequency-lock mode (rw) */
+
+#define STA_INS 0x0010 /* insert leap (rw) */
+#define STA_DEL 0x0020 /* delete leap (rw) */
+#define STA_UNSYNC 0x0040 /* clock unsynchronized (rw) */
+#define STA_FREQHOLD 0x0080 /* hold frequency (rw) */
+
+#define STA_PPSSIGNAL 0x0100 /* PPS signal present (ro) */
+#define STA_PPSJITTER 0x0200 /* PPS signal jitter exceeded (ro) */
+#define STA_PPSWANDER 0x0400 /* PPS signal wander exceeded (ro) */
+#define STA_PPSERROR 0x0800 /* PPS signal calibration error (ro) */
+
+#define STA_CLOCKERR 0x1000 /* clock hardware fault (ro) */
+
+#define STA_RONLY (STA_PPSSIGNAL | STA_PPSJITTER | STA_PPSWANDER | \
+ STA_PPSERROR | STA_CLOCKERR) /* read-only bits */
+
+/* Clock states (time_state) */
+#define TIME_OK 0 /* clock synchronized, no leap second */
+#define TIME_INS 1 /* insert leap second */
+#define TIME_DEL 2 /* delete leap second */
+#define TIME_OOP 3 /* leap second in progress */
+#define TIME_WAIT 4 /* leap second has occurred */
+#define TIME_ERROR 5 /* clock not synchronized */
+#define TIME_BAD TIME_ERROR /* bw compat */
+
+/* Maximum time constant of the PLL. */
+#define MAXTC 6
+
+__BEGIN_DECLS
+
+extern int __adjtimex __P ((struct timex *__ntx));
+extern int adjtimex __P ((struct timex *__ntx));
+
+extern int ntp_gettime __P ((struct ntptimeval *__ntv));
+extern int ntp_adjtime __P ((struct timex *__tntx));
+
+__END_DECLS
+
+#endif /* sys/timex.h */