It is the first time the Ireland international has been in the squad since suffering a double fracture of his leg last March whilst playing for his country against Wales in a World Cup qualifier, and it represents a major step forward for the player, although he is unlikely to feature.
Everton will also be without Ramiro Funes Mori, who is back in training after knee surgery but is some way off a first-team return.
Sam Allardyce is looking to turn around a run which has seen the side fail to win in seven matches.
The immediate impact of the new manager's arrival in November has worn off and just two clean sheets during their current downturn tells its own story.
"We are in a difficult position results-wise and we have to turn that around as quickly as we can," he said.
"We still have that balance of expanding on our attacking football to be creating chances and scoring, but never forgetting we have to get our clean sheet record back on track."