Kilmarnock have signed former Aberdeen goalkeeper Gary Woods after their summer loan arrival from Middlesbrough, Zach Hemming, picked up an injury.
He had found himself back-up to Joe Lewis until his summer release.
McInnes told his club website: "I know exactly how hard he works, how dedicated he is Monday to Friday."
Woods, who made only five Aberdeen appearances last season, will vie with former Colchester United goalkeeper Sam Walker for a start while their fellow Englishman is sidelined.
Walker replaced Hemming at half-time during Saturday's 3-0 Scottish League Cup win over Montrose.
McInnes said the injury "may keep him out a bit longer than we had hoped".