Nottingham Forest have confirmed midfielder Cafu's loan move from Olympiacos has been made permanent.
The 27-year-old had made the move to the City Ground from the fellow Evangelos Marinakis-owned club in the summer, on a season-long loan deal.
But he is now set to stay with the Reds on a permanent basis.
Cafu has made 15 appearances for the club so far this season, becoming a regular under manager Chris Hughton.
Announcing the move, Forest said: "Nottingham Forest can confirm that Cafu has now completed a permanent transfer to The City Ground from Olympiakos following his successful loan period.
"The Portuguese midfielder has made 15 appearances for the Reds since joining in October 2020 and been a regular starter in Chris Hughton’s side in recent weeks.
"The Cafu transfer concluded the Reds' January transfer window business which saw the loan arrivals of highly-rated midfielders Filip Krovinovic from Benfica and James Garner from Manchester United, plus the extension of Antony Knockaert’s successful loan spell from Fulham.
"Glenn Murray also arrived on a short-term deal from Brighton to add further Championship experience and firepower to the end of the season."
Cafu's two-and-a-half-year contract is set to run until the summer of 2023.