 On 29 February 2008, he struck a brace against title contenders Club Brugge.Charleroi secured Théréau's services permanently on 9 June 2008 on a three-year contract.On 10 March 2010, he reached a hat-trick in a 4–1 defeat of relegation rivals Lokeren – his club's first win of the year – which all but guaranteed Charleroi's Belgian Pro league status.