The invention relates to a method for operating an anti-lock brake installation of a motor vehicle, which comprises a servobrake that is activated independent from the will of the driver and intended to assist the driver is case of applying the brakes in a state of panic. According to said method, the pneumatic servobrake (5) is activated when the need to support the driver has been recognized, thereby switching a separating valve (10) that separates the main brake cylinder (3) from the wheel brakes (17, 18) to its closed position and a pilot valve (9) that is inserted in a connection between the main brake cylinder (3) and the suction side of a recirculating pump (7) in its opened position, simultaneously with the actuation of the recirculating pump (7) but in a time delayed way.