In the article “A Missense Mutation in the Sodium Channel Scn8a Is Responsible for Cerebellar Ataxia in the Mouse Mutant jolting” by David C. Kohrman, Marianne R. Smith, Alan L. Goldin, John Harris, and Miriam H. Meisler, which appeared on pages 5993–5999 of the October 1, 1996 issue, the mutated residue in the Scn8a-jolting spontaneous mouse mutant was incorrectly identified. It should be Ala1319Thr. The location and adjacent sequence were correctly indicated in Figure 2. The mutation causes a recessively inherited ataxia syndrome due to a shift in voltage dependence of channel opening. This change in numbering of the mutated amino acid does not affect the interpretation of the results.