Wrexham have senior keeper Andy Dibble back in the starting line-up following injury and Smith told the club's official website that youth trainee Michael Jones will now provide back-up.
Andy Dibble was brought on but had no chance with Gabbiadini's spot kick, his 25th goal of the season, as Darlington took a two-goal lead over their bitter rivals in the Third Division's play-off semi-final first leg.