A system for controlling the pumping capacity of a lubricant pump for an internal-combustion engine, having a vane cell pump (2) which has a rotor body (4), rotor blades (10) which can be radially displaced in the rotor body as well as a lifting ring (12) (stator) whose position can be adjusted with respect to the axis of rotation of the rotor for changing the delivery volume as a function of operating parameters of the internal-combustion engine. The lifting ring (12) is linked to an adjusting piston (28) guided in a valve bore (30) of a pressure regulating valve (26), which adjusting piston (28) is acted upon by engine oil pressure on a piston front side (34), the piston front side (34) being connected with the piston rear side (37) by way of a throttle bore (62).