This errata sheet describes an errata in the Early Childhood Longitudinal Study, Kindergarten Class of 1998-99 (ECLS-K) restricted- and public-use data files household roster. During all seven waves of the ECLS-K, family roster data were collected that identified the type of relationship between each roster member and the study child. There were 13 types of relationships that a roster member could have with the study child (see question text below). However, for wave 4 (spring first grade) and wave 5 (spring third grade), individuals who were identified as the relationship type “grandfather” had their value on the corresponding relationship type variable set to -7 and individuals who were identified as the relationship type “aunt” had their value on the corresponding relationship type variable set to -8. (author abstract)