Tiddy Smith, Philosophia, 42, 173–179 has recently argued that there is an enlightenment problem for Millianism. In this paper I show that Smith’s argument rests on a misunderstanding, and that the enlightenment problem can be solved according to standard versions of Millianism. In fact, the problem can be solved according to Nathan Salmon’s version of Millianism, which is one of Smith’s main targets.