--- xvi-2.50.3/src/unix.c.orig
+++ xvi-2.50.3/src/unix.c
@@ -574,6 +574,10 @@
 #ifdef	TERMIO
 #   ifdef	POSIX
 	ospeed = cfgetospeed(&cooked_state);
+	if (ospeed > 18) {
+	        /* GNU termcap can't handle large values */
+		ospeed = 0;
+	}
 #   else	/* not POSIX */
 	ospeed = speeds[cooked_state.c_cflag & CBAUD];
 #   endif