Jordan Botaka has been released by Leeds.
Botaka was on-loan at Charlton last season, and failed to establish himself in the first-team under Russell Slade or current boss Karl Robinson.
He could not dislodge Ricky Holmes and Wigan loanee Nathan Byrne from the starting eleven.
Botaka made 29 appearances and scored twice in a disappointing season for the Addicks, which saw them finish 13th in League One.
The DR Congo winger was signed by Leeds for a fee believed to be around £1m in 2015, but only started three league games.