Despite the promising prospects, De Wulf did not play much for Club Brugge under the coaching of Trond Sollied, and he was loaned for six months to Tromsø IL.
At the end of his loan, Tromsø wanted to buy De Wulf, but Club halted his transfer.
Eventually, De Wulf was loaned for one season to Cercle Brugge, thanks to the good relations between the chairmen of both teams.
However, due to Denis Viane and Anthony Portier proving to be Cercle's solid back bone in the 2007–08 season, De Wulf's chances to play were rather limited.
At the end of the season, the Cercle board told De Wulf they would not start doing difficult if he found himself a new team.