--- term-utils/agetty.c
+++ term-utils/agetty.c	2014-02-04 08:50:09.798235374 +0000
@@ -571,6 +571,7 @@ static void login_options_to_argv(char *
 /* Parse command-line arguments. */
 static void parse_args(int argc, char **argv, struct options *op)
 {
+	char *ptr;
 	int c;
 
 	enum {
@@ -745,8 +746,16 @@ static void parse_args(int argc, char **
 		usage(stderr);
 	}
 
+	c = asprintf(&ptr, "/dev/%s", argv[optind]);
+	if (c < 0)
+		log_err(_("failed to allocate memory: %m"));
+
+	c = access(ptr, F_OK);
+	free(ptr);
+	errno = 0;
+
 	/* Accept "tty", "baudrate tty", and "tty baudrate". */
-	if ('0' <= argv[optind][0] && argv[optind][0] <= '9') {
+	if (c < 0) {
 		/* Assume BSD style speed. */
 		parse_speeds(op, argv[optind++]);
 		if (argc < optind + 1) {