A reciprocating compressor comprising a cylinder and a piston dividing the cavity in the cylinder into a first and a second chamber being connected through respective suction valve systems and discharge valve systems to a suction duct and a discharge duct. The suction and discharge valve systems each including a housing defining a valve chamber and a valve body, whereby the compressor is further provided with a vessel defining a volume in fluid connection with a valve chamber of one of the discharge valve systems by a conduit.