Haroun made his Cercle Brugge debut, playing in the midfield position, in a 4–0 loss against Gent on 22 November 2014. Since making his debut for the club, he quickly established himself in the starting line–up, playing in the midfield position. However, Haroun suffered ankle injury during a 2–0 win against RSC Charleroi on 17 January 2015 and missed two matches as a result. It wasn't until on 8 February 2015 when he returned from injury against Anderlecht but suffered ankle injury and was substituted in the 24th minutes, losing 2–0. As a result, Haroun was sidelined for a month and didn't make his return on 15 March 2015, in a 3–2 loss against KV Mechelen. He played four more matches, as Cercle Brugge lost Play-Off III to SK Lierse and relegate to second division. At the end of the 2014–15 season, Haroun made thirteen appearances in all competitions.