Auxerre have signed Tunisia striker Issam Jemaa from French rivals Lens on a four-year deal.
The 27-year-old cost Auxerre almost US$3 million.
Last season Jemaa scored five goals in 26 games for Lens and he grabbed a hat-trick for Tunisia as they beat Chad 5-0 last month in a 2012 Africa Cup of Nations qualifier.
He signed for Lens in 2005 from Tunisian club Esperance with whom he won the title in 2004.
His time with Lens also included a season on loan at Caen.