The 23-year old Belgian international settled well into life at Craven Cottage in his debut campaign and is now looking forward to a further challenge in European club football's second tier.
"We will be playing in the Uefa Europa League too, and that is something that I am really looking forward too," he told the club's official website.
"I know that the club did very well in that competition a few years back and I know we would all like to be successful again.
"It's an early start for us, but we have to look at the positives - it is fantastic that this club will be playing in Europe for a second time in three seasons. Fulham played some of Europe's top teams last time, and it would be great to experience nights like that myself.
"I'm looking forward to the challenge."