Iran forward Saman Ghoddos has joined Brentford in a permanent deal.
The 27-year-old had been on season-long loan from French side Amiens with an option to buy, and has now signed a deal until the summer of 2023, which could be extended for an extra year.
He has played 19 times since his debut in October and scored the Bees' winner against Middlesbrough in the FA Cup.
Sweden-born Ghoddos began his career at Ostersunds and featured in their Europa League campaign in 2017-18.
Skipper Jansson has ankle operation
Meanwhile, Brentford captain Pontus Jansson has had surgery on an ankle injury.
The 29-year-old centre-back has made 14 league appearances for the Bees this season, but has not featured for the Thomas Frank's side since 30 December.
The west London club say the Sweden international has been "troubled" by the injury "for some time".
Brentford have not put a precise timescale on Jansson's return, but hope to have him available for the run-in at the end of the campaign.
The Bees are fourth in the Championship table, two points off the automatic promotion places with a game in hand on the teams above them.
Jansson is also hoping to be fit for the European Championship, starting in June, when Sweden are in the same group as Spain, Poland and Slovakia.