Under Jim Magilton, Wilnis frequently found himself on the sidelines, but signed a new one-year contract in May 2007. The revival of form by Spanish defender Sito Castro and the strong partnership of Alex Bruce and Jason de Vos, made it hard for Wilnis to break back into the side. After Ipswich's final game of the 2007–08 season, Wilnis announced that he was to retire as a player, but was interested in coaching opportunities at Ipswich. Unfortunately he was told there were no vacancies at Portman Road at the time, which brought to an end a long association with the club. He was released by the club at the end of the 2007–08 season.