Derek Niven is doubtful for Chesterfield but Dean Morgan could return.
Midfielder Niven will be assessed having been forced off in the 53rd minute of last Friday's goalless draw at Torquay with a jarred ankle.
Forward Morgan, meanwhile, missed the Plainmoor encounter altogether with a thigh strain but is hoping to return for the final day clash at a sold-out b2net Stadium.
Fit-again defender Simon Ford returned to enjoy a starting role in what was his first match in over two months against the Gulls and he has not suffered any ill-effects.
The Spireites go into the game knowing just a point will be enough to get their hands on the League Two title while second-placed Bury must win at Stevenage to have any chance at all of overtaking John Sheridan's side at the summit.
But Gillingham, unbeaten in 11 away from home, go into the clash needing the points themselves, with the Kent club one of three sides on 68 points competing for two remaining play-off berths.
Gillingham will be without defensive duo Barry Fuller and Josh Gowling.
The Gills must avoid defeat against the Spireites to have any real hope of making the play-offs, but they are hampered by being without skipper Fuller, who suffered a bruised knee against Macclesfield last week.
Centre-half Gowling remains sidelined with the ankle problem that has seen him miss the last two matches but he, along with Fuller, could return should the Gills secure a place in the season finale.
Meanwhile, defender Simon King is a doubt after being replaced at half-time against the Silkmen with a tight hamstring, while veteran midfielder Kevin Maher is struggling with a virus.
Winger Andy Barcham (hamstring) and midfielder Curtis Weston (knee) face late fitness tests, while Mark Bentley should be fit despite a bruised back.
Should Andy Hessenthaler's men better a result attained by either Stevenage or Torquay, who play Bury and Rotherham respectively, they will secure a play-off spot.