diff --git a/agetty-on-s390-on-dev-3270-tty1-line.patch b/agetty-on-s390-on-dev-3270-tty1-line.patch
index b8ac68a..f40d71a 100644
--- a/agetty-on-s390-on-dev-3270-tty1-line.patch
+++ b/agetty-on-s390-on-dev-3270-tty1-line.patch
@@ -1,28 +1,29 @@
 --- 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 *
++++ term-utils/agetty.c	2014-02-04 09:28:32.564461786 +0000
+@@ -568,6 +568,8 @@ static void login_options_to_argv(char *
+ 	*argc = i;
+ }
+ 
++#define is_speed(str) (strlen((str)) == strspn((str), "0123456789,"))
++
  /* 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);
+@@ -746,7 +748,7 @@ static void parse_args(int argc, char **
  	}
  
-+	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) {
++	if (is_speed(argv[optind])) {
  		/* Assume BSD style speed. */
  		parse_speeds(op, argv[optind++]);
  		if (argc < optind + 1) {
+@@ -758,7 +760,7 @@ static void parse_args(int argc, char **
+ 		op->tty = argv[optind++];
+ 		if (argc > optind) {
+ 			char *v = argv[optind++];
+-			if ('0' <= *v && *v <= '9')
++			if (is_speed(*v))
+ 				parse_speeds(op, v);
+ 			else
+ 				op->speeds[op->numspeed++] = bcode("9600");