In Reply We recognize that p.Gly187Ala1 and p.Val330Phe2 variants in trans with the common 1–kilobase pair deletion were erroneously classified in the severe neuronal ceroid lipofuscinosis (NCL) group and should be considered to be associated with the classic CLN3-associated NCL. We apologize for this error in our article.3 This error was discovered by Masten et al and reported in their comment on our article.