An electric machine for starting an internal combustion engine, comprising a housing (10) having at least one sealing device (14) which seals an interior (10a) of the housing with respect to the surroundings of the housing (10), and at least one pressure reduction device (1), wherein the at least one pressure reduction device (1) is embodied so as to be moveable in a translatory fashion relative to the at least one sealing device (14) in order to form, in the case of an overpressure in the interior (10a) of the housing, at least one venting duct via which an at least partial reduction in pressure is ensured.