}
/* get the stripe offset */
if (stripe_off_arg != NULL) {
- st_offset = strtoul(stripe_off_arg, &end, 0);
+ st_offset = strtol(stripe_off_arg, &end, 0);
if (*end != '\0') {
fprintf(stderr, "error: %s: bad stripe offset '%s'\n",
argv[0], stripe_off_arg);