- /* can't set these if we don't have a stream attached below /dev/ppp */
- if (strioctl(pppfd, PPPIO_XACCM, &asyncmap, sizeof(asyncmap), 0) < 0) {
- error("Couldn't set transmit ACCM: %m");
+ if (!sync_serial) {
+ if (strioctl(pppfd, PPPIO_XACCM, &asyncmap, sizeof(asyncmap), 0) < 0) {
+ error("Couldn't set transmit ACCM: %m");
+ }