In a device for adjusting the relative angular position of two rotating elements which are connected to a drive and, via a transmission element, to an actuating shaft by which, driven by a rotor of an electric actuating drive including a winding, the relative angular position of the rotating elements can be changed, the actuating shaft is operatively connected to at least one of the rotating elements and the winding is biased axially into engagement with one of the rotating elements for locking the drive while the electric actuating drive is de-energized.