Stephen Hughes will go straight into Aberdeen's after signing for the club on Friday morning.
The 29-year-old former Rangers midfielder has agreed a two-and-a-half year deal with the Dons.
He boosts a squad still without midfielders Rob Milsom, Isaac Osbourne and Peter Pawlett due to injury.
Dunfermline are without the in-form Andy Barrowman after the striker pulled a calf muscle in the midweek defeat to Motherwell.
Captain Austin McCann could return from a hamstring problem but midfielder Paul Burns remains sidelined with a dead leg.
Manager Jim McIntyre is also without long-term absentees Paul Gallacher, Nick Phinn, Steven Bell and Steven McDougall.
Aberdeen (from): Brown, Considine, McArdle, Reynolds, Robertson, Clark, Arnason, Jack, Fyvie, Vernon, Megginson, Chalali, Fallon, Langfield, Paton, Magennis, Mackie, Masson, Hughes.
Dunfermline (from): Turner, Rutkiewicz, Boyle, McCann, Dowie, Keddie, Hardie, Mason, Kerr, Cardle, Willis, Graham, Kirk, Buchanan, Byrne, Smith, Potter, Thomson.