Control device for a recuperative brake system of a vehicle, having: an actuation device by means of which at least one electric motor of the recuperative brake system and at least one further friction brake system of the recuperative brake system can be actuated, with the result that the vehicle can be at least slowed down during a braking time, wherein a setpoint engine braking torque (Mm-setp) which is to be applied by means of the at least one electric motor and a setpoint friction braking torque (Mr-setp) which is to be applied by means of the at least one further friction brake system can be defined repeatedly during the braking time at least taking into account a predefinition signal relating to a setpoint total braking torque (Mges-setp) which can be predefined by a driver by means of activation of a brake activation element of the vehicle and/or of an automatic speed control system of the vehicle, and at least one motor control signal which corresponds to the defined setpoint motor braking torque (Mm-setp) can be output to the at least one electric motor, and at least one friction brake control signal corresponding to the defined setpoint friction braking torque (Mr-setp) can be output to the at least one friction brake system, repeatedly during the braking time; wherein the actuation device is additionally configured to define the setpoint motor braking torque (Mm-setp) during the braking time while additionally taking into account a predefined weighting factor; characterized in that the actuation device is additionally configured: to determine a setpoint total braking torque change (a-setp), which has occurred during the braking time, while taking into account the predefinition signal or to receive said setpoint total braking torque change (a-setp) by means of a first data signal which is made available; to determine an actual total braking torque change (a-act), which has occurred during the braking time, while taking into account at least one sensor signal which is made available, of at least one speed sensor and/or at least one deceleration sensor or to receive said actual total braking torque change (a-act) by means of a second data signal which is made available, to determine a deviation of the actual total braking torque change (a-act) from the setpoint total braking torque change (a-setp) at least in so far as the setpoint motor braking torque (Mm-setp) is reduced and the setpoint friction braking torque (Mr-setp) is increased during the braking time, in so far as the deviation is unequal to zero, to re-define the weighting factor after the braking time by taking into account a comparison of the setpoint total braking torque change (a-setp) with the actual total braking torque change (a-act) in that the weighting factor is changed by a product of the determined deviation and a predefined smoothing factor. an actuation device by means of which at least one electric motor of the recuperative brake system and at least one further friction brake system of the recuperative brake system can be actuated, with the result that the vehicle can be at least slowed down during a braking time, wherein a setpoint engine braking torque (Mm-setp) which is to be applied by means of the at least one electric motor and a setpoint friction braking torque (Mr-setp) which is to be applied by means of the at least one further friction brake system can be defined repeatedly during the braking time at least taking into account a predefinition signal relating to a setpoint total braking torque (Mges-setp) which can be predefined by a driver by means of activation of a brake activation element of the vehicle and/or of an automatic speed control system of the vehicle, and at least one motor control signal which corresponds to the defined setpoint motor braking torque (Mm-setp) can be output to the at least one electric motor, and at least one friction brake control signal corresponding to the defined setpoint friction braking torque (Mr-setp) can be output to the at least one friction brake system, repeatedly during the braking time; wherein the actuation device is additionally configured to define the setpoint motor braking torque (Mm-setp) during the braking time while additionally taking into account a predefined weighting factor; to determine a setpoint total braking torque change (a-setp), which has occurred during the braking time, while taking into account the predefinition signal or to receive said setpoint total braking torque change (a-setp) by means of a first data signal which is made available; to determine an actual total braking torque change (a-act), which has occurred during the braking time, while taking into account at least one sensor signal which is made available, of at least one speed sensor and/or at least one deceleration sensor or to receive said actual total braking torque change (a-act) by means of a second data signal which is made available, to determine a deviation of the actual total braking torque change (a-act) from the setpoint total braking torque change (a-setp) at least in so far as the setpoint motor braking torque (Mm-setp) is reduced and the setpoint friction braking torque (Mr-setp) is increased during the braking time, in so far as the deviation is unequal to zero, to re-define the weighting factor after the braking time by taking into account a comparison of the setpoint total braking torque change (a-setp) with the actual total braking torque change (a-act) in that the weighting factor is changed by a product of the determined deviation and a predefined smoothing factor.