The New Zealand international missed Sundayâ€™s loss to the Melbourne Victory because of a virus but will be back to take on the Reds in what is shaping up to be a very important clash as Gold Coast strive for a top-four finish.
But as Smeltz returns, United coach Miron Bleiberg is sweating on the fitness of key midfielder Bas van den Brink and left-back Adama Traore who are both under injury clouds.
Dutchman van den Brink twisted his knee in a challenge with Victory midfielder Grant Brebner on the weekend and is in major doubt for Skilled Park fixture.
â€śBas will have an MRI later today and hopefully we will get a nice surprise and he will be okay, but itâ€™s no better than a 50/50 chance at this stage,â€ť said Bleiberg.
â€śGiven the short turnaround between matches itâ€™s fair to say that there are big question marks about both of them, but we will be positive until we hear otherwise.â€ť
Fourth-placed United meet third-placed Adelaide in the Week 25 midweek clash in Robina â€“ kick-off is at 8:00pm local (9:00 AEDT).