The 35-year-old scored just two league goals in 25 Premiership appearances for the Addicks as well as a brace against Chesterfield in the Carling Cup.
However, the Holland international´s last goal was in the Addicks´ 3-1 home defeat by his former team Middlesbrough in January and his presence was not enough to save the club from relegation to the Coca-Cola Championship.
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