diff --git a/sys/compat/ultrix/ultrix_tty.h b/sys/compat/ultrix/ultrix_tty.h
new file mode 100644
index 000000000000..c1ebb2ed5d99
--- /dev/null
+++ b/sys/compat/ultrix/ultrix_tty.h
@@ -0,0 +1,39 @@
+/*	$NetBSD: ultrix_tty.h,v 1.1 1995/12/27 19:57:25 jonathan Exp $	*/
+
+/* From:  NetBSD sunos.h,v 1.4 1995/03/04 09:50:00 pk Exp 	*/
+
+
+struct ultrix_ttysize {
+	int	ts_row;
+	int	ts_col;
+};
+
+struct ultrix_termio {
+	u_short	c_iflag;
+	u_short	c_oflag;
+	u_short	c_cflag;
+	u_short	c_lflag;
+	char	c_line;
+	unsigned char c_cc[10];	/* 8 for SunOS */
+};
+#define ULTRIX_TCGETA	_IOR('t', 91, struct ultrix_termio)
+#define ULTRIX_TCSETA	_IOW('t', 90, struct ultrix_termio)
+#define ULTRIX_TCSETAW	_IOW('t', 89, struct ultrix_termio)
+#define ULTRIX_TCSETAF	_IOW('t', 88, struct ultrix_termio)
+
+struct ultrix_termios {
+	u_long	c_iflag;
+	u_long	c_oflag;
+	u_long	c_cflag;
+	u_long	c_lflag;
+	u_char	c_cc[19]; /* 17 for Sun */
+	u_char	c_line;
+};
+#define ULTRIX_TCXONC	_IO('T', 6)
+#define ULTRIX_TCFLSH	_IO('T', 7)
+#define ULTRIX_TCGETS	_IOR('t', 85, struct ultrix_termios)
+#define ULTRIX_TCSETS	_IOW('t', 84, struct ultrix_termios) /*NOW*/
+#define ULTRIX_TCSETSW	_IOW('t', 83, struct ultrix_termios) /* Drain&set*/
+#define ULTRIX_TCSETSF	_IOW('t', 82, struct ultrix_termios) /*Drainflush,set*/
+#define ULTRIX_TCSNDBRK	_IO('T', 12)
+#define ULTRIX_TCDRAIN	_IO('T', 13)