Right-back McCormack is back in training after missing last weekend's goalless draw at Carlisle with a glute problem.
Centre-half Harlee Dean is also on the mend after a groin injury but boss Mark Warburton is wary of rushing him back and may stick with James Tarkowski, who performed well on his debut at Brunton Park.
The Bees, who have slipped to third after taking one point from their last two matches, are still without winger Sam Saunders as he recovers from minor knee surgery.
- Sports & Recreation
- James Tarkowski
- Mark Warburton