r = sd_event_add_io(s->event, &s->syslog_event_source, s->syslog_fd, EPOLLIN, process_datagram, s);
if (r < 0) {
- log_error_errno(-r, "Failed to add syslog server fd to event loop: %m");
+ log_error_errno(r, "Failed to add syslog server fd to event loop: %m");
return r;
}