The 19-year-old links up with Gary Caldwell’s League One side as they look to build on a strong finish to last season, after his arrival sparked a late upturn in form that saw the Latics climb clear of the relegation zone and finish 16th.
Mustapha spent the first half of the 2025/26 on loan at German side 1. FC Nürnberg before moving on to West Bromwich Albion in the Championship for the remainder of the campaign.
He enjoyed a standout 2024/25 campaign, recording 11 goals and seven assists in 29 appearances, winning the Under-21s’ Player of the Season award and earning a nomination for the Premier League 2 Player of the Season award.
He also received his first senior call-up for Sierra Leone, scoring once in three appearances, and has been involved in the senior set-up at Palace, including featuring in a mid-season friendly against HamKam in March 2025.
Mustapha signed a new contract last summer, keeping him at the club until 2028.
Everyone at Crystal Palace wishes Hindolo the very best during his loan spell at Wigan Athletic.