Fix for https://support.ntp.org/bugs/show_bug.cgi?id=769 - Patch from gentoo.
--- /dev/null
+https://support.ntp.org/bugs/show_bug.cgi?id=769
+http://bugs.gentoo.org/254030
+
+--- ntp/util/tickadj.c
++++ ntp/util/tickadj.c
+@@ -21,7 +21,8 @@
+ # include <unistd.h>
+ #endif /* HAVE_UNISTD_H */
+
+-#ifdef HAVE___ADJTIMEX /* Linux */
++/* proper handling here has been moved to upstream ntp bugzilla */
++#ifdef linux
+
+ #include <sys/timex.h>
+ struct timex txc;
+@@ -91,7 +92,7 @@
+ }
+
+ if (!errflg) {
+- if (__adjtimex(&txc) < 0)
++ if (adjtimex(&txc) < 0)
+ perror("adjtimex");
+ else if (!quiet)
+ printf("tick = %ld\ntick_adj = %d\n",
+@@ -146,7 +147,7 @@
+ #endif
+ }
+
+- if (__adjtimex(&txc) < 0)
++ if (adjtimex(&txc) < 0)
+ {
+ perror("adjtimex");
+ }