Electric machine (10), in particular AC generator, with a stator (16), which has an electromagnetically effective surface (19), with a rotor (20), which likewise has an electromagnetically effective surface (26), wherein the electromagnetically effective surface (26) of the rotor (20) is opposite the electromagnetically effective surface (19) of the stator (16) so as to ensure interaction, wherein the rotor (20) has a plurality of poles (24, 25) which can be provided with different polarity and, between adjacent poles (24, 25) which can be provided with different polarity, interspaces (21) for pole isolation, wherein in each case one apparatus (66) for compensating for leakage flux with an active body (55) is arranged in at least two interspaces (21), characterized in that an apparatus (66) for compensating for leakage flux with an active body (55) is arranged in one interspace (21) and an apparatus (66) for compensating for leakage flux with a differently designed active body (55) is arranged in another interspace (21).