We report the case of a 6-month-old child, who suffered from acute haemolysis following transfusion of salvaged blood. This complication, of favourable outcome, was related to the accidental aspiration of benzalkonium chloride into the cell saver. This case emphasizes that any adjunction of antiseptic solution is contraindicated during blood saving. The use of a cell saver must be associated with written protocols, describing clearly the contraindications, precautions of use, and the different steps of use of this method of autologous blood transfusion.