Journal of Algebra 523 (2019) 365–367 Contents lists available at ScienceDirect Journal of Algebra www.elsevier.com/locate/jalgebra Corrigendum Corrigendum to “Effective subgroup separability of finitely generated nilpotent groups” [J. Algebra 506 (2018) 489–508] Jonas Deré * , Mark Pengitore a r t i c l e i n f o a b s t r a c t Article history: Received 27 November 2018 Available online 21 January 2019 Communicated by Dan Segal The purpose of this short note is to provide a correction to the second statement of [1, Theorem 1.1]. © 2019 Elsevier Inc. All rights reserved. All notation and terminology will be taken from [1]. We recall the second statement of [1, Theorem 1.1] below. Theorem 1. Let N be a torsion-free, finitely generated nilpotent group with a finite gen- erating subset S. If H  N is a normal subgroup of infinite index, there exists a constant ψ(N, H) ∈ N such that F N,H,S (n) ≈ (log(n)) ψ(N,H) . The proof of this theorem was in two steps. We first proved [1, Proposition 4.1] which implies that F N,H,S (n) ≈ F N  H ,{1}, ¯ S (n). We then appealed to a characterization of F N,{1},S (n) for infinite, finitely generated nilpotent groups as given in [4, Theorem 1.1]. However, a counterexample to the latter result was communicated to the second author DOI of original article: https://doi.org/10.1016/j.jalgebra.2018.03.035. * Corresponding author. E-mail address: jonas.dere@kuleuven.be (J. Deré). https://doi.org/10.1016/j.jalgebra.2018.12.025 0021-8693/© 2019 Elsevier Inc. All rights reserved.