Supplément au voyage de Bougainville, ou dialogue entre A et B sur l'inconvénient d'attacher des idées morales à certaines actions physiques qui n'en comportent pas. ("Addendum to the Journey of Bougainville, or dialogue between A and B on the drawback to binding moral ideas to certain physical actions which bear none") is a set of philosophical dialogues written by Denis Diderot, inspired by Louis Antoine de Bougainville's Voyage autour du monde. It was written in 1772 for the journal Correspondance littéraire, which commissioned him to review Bougainville's account of his travels, but not published until 1796.