Malaga, who face Real Madrid in the final game of the season in La Liga, will have an added bonus if Zinedine Zidane's side win the league.
The Andalusian club will receive one million euros if Madrid, who need just one point from their last game, end the season ahead of Barcelona at the top of the table.
According to El Desmarque, when Malaga sold Isco to Real Madrid, a clause was included which stipulates Madrid must pay an additional one million euros if they win the league while Isco is still at the club.
Remember that Isco was sold by Malaga to Madrid for an initial fee of 27 million euros plus bonuses, but Los Blancos have not won La Liga since the deal happened.
Madrid's win at Balaidos on Wednesday, though, means they are closing in on a first league title since 2012. Only Malaga can stop them, although it would mean a loss of one million euros.