The 29-year-old, who was on loan at Marseille, has signed a three-and-a-half year deal with LOSC, and may not be the only new arrival at the club, as two players are currently on trial at Grimonprez-Jooris.
Steve Barbe is one of the men hoping to earn a contract. The former Charlton midfielder failed to make a real impact in England, but is keen to prove his worth in France.
The 23-year-old Belgian has formerly played for RWDM and Harelbeke.
The other player has also been on the books of an English club - Guy Demel.
The Borussia Dortmund defender was formerly with Arsenal.