Both Lacan and Nancy saw in the conceptual structure of the Kantian ethical law a kind of anomaly in modern philosophy. For Lacan, the moral Law generates the broken structure of desire. For Nancy, in the categorical character of the imperative comes to light a structure of being-addressed which deconstructs from the inside the self-centred rational and autonomous subject. On the ground of different reason Lacan and Nancy come to the same conclusion: the Kantian form of the law deprives the (Cartesian) subject of its autorefertiality, of its mastery of itself.