--- tcpconn.c.orig	Thu Aug 26 00:22:26 1999
+++ tcpconn.c	Thu Aug 26 00:30:52 1999
@@ -44,6 +44,9 @@
 	char buff[BUFF_SIZE], device[128], *s;
 
 	*device = 0;
+	if (argc < 2)
+		errorf ("tcpconn: error: hostname required\n" \
+			"Usage: tcpconn [-d pty] [-p port] hostname[:port]\n");
 	for (n = 1; *argv[n] == '-'; n++)
 		switch (argv[n][1])
 		{
