The invention relates to a high-pressure fuel pump and to a method for reducing irregularities of the driving force of the high-pressure fuel pump having a pump unit. The high-pressure fuel pump comprises a pump unit, a drive unit which drives the pump unit by means of a driving force, a valve having an adjustable flow rate which is hydraulically coupled to the pump unit, and a control unit for determining the driving force and for controlling the flow rate through the valve in accordance with the driving force.