This concerns the critical behavior of the restricted primitive model. Luijten, Fisher, and Panagiotopoulos [J. Chem. Phys. 114, 5468 (2001)] recently suggested that canonical heat capacity data previously published by us might be consistent with nonclassical behavior, which had appeared unlikely to us. Their argument turns on a supposed similarity of behavior of our results with results they have obtained for a lattice version of the model. We point out that the behaviors are in fact very dissimilar, however, and we explain why we do not find their suggestion plausible.