Wolves must cough up an extra fee to Barcelona for their summer deal for Nelson Semedo.
Semedo left Barca for Wolves before the start of the season.
And after completing ten games for defeat to Aston Villa, Wolves will pay Barca another £1.8m fee for the defender.
Wolves had paid around £27m originally for Semedo.
And should Wolves qualify for Europe this season, a further £7.5m will be due.
