diff --git a/usr.sbin/xntpd/machines/hpux10+ b/usr.sbin/xntpd/machines/hpux10+
index f4b420c149d2..0119b6329d7e 100644
--- a/usr.sbin/xntpd/machines/hpux10+
+++ b/usr.sbin/xntpd/machines/hpux10+
@@ -1,7 +1,7 @@
 SHELL=         /bin/sh
 RANLIB=	       ls # ar does the work of ranlib under System V
 DEFS_LOCAL=    -DREFCLOCK
-DEFS=          -DHAVE_SYSV_TTYS -DSYS_HPUX=10
+DEFS=          -DHAVE_TERMIOS -DSYS_HPUX=10
 AUTHDEFS=      -DDES -DMD5
 CLOCKDEFS=     -DLOCAL_CLOCK
 COPTS=