The centre-back has been sidelined for more than a month with an ankle injury.
"I feel good. I'm back available, been training and I'm looking forward to it," said Maguire.
"Obviously the injury was a setback club football wise.
"Internationally I wanted to come into this with a lot of games under my belt with full fitness.
"I've done a few sessions now and feel like my fitness is there, so I'm available for the game."