I present a new puzzle that concerns Aristotle’s accidents. This puzzle arises when applying a basic requirement of accidentality to the variety of cases Aristotle provides. In short, Aristotle seems to offer, now the thought that a is accidental to b, and now that b is accidental to a; but if accidentality is asymmetric, as it seems to be, then a’s being accidental to b implies that b is not accidental to a. One might offer a schooled Aristotelian solution, allowing that while a is in a sense accidental to b, b is accidental to a in a quite different sense. But, as I will argue, this solution does not work, for there are cases in which a and b are accidental to each other in the same sense. Ultimately, the solution to the new puzzle relies not on distinguishing between senses of ‘accident’ but rather on distinguishing between accidentality and accidental sameness.