The invention relates to a planetary gear set having an anti-turn mechanism, comprising a sun fear and at least one planet gear revolving in a fear housing having an internal toothing, wherein the gear housing is connected to at least one bearing flange on the output side and/or on the input side, and for the anti-turn connection to the gear housing, toothing means are provided which engage with the internal toothing. According to the invention at least one tooth segment is provided as a toothing means, the tooth segment comprises a tooth segment body, and the bearing flange has an opening for positively receiving the tooth segment body.