Nat. Immunol. 18, 1160–1172 (2017); published online 7 August 2017; corrected after print 20 September 2017

In the version of this article initially published, the methods section lacked information on the provenance of the BATF-deficient mice used in the study. The first paragraph of Online Methods should end as follows: “BATF-deficient mice (129S-Batftm1.1Kmm/J) were obtained from Jackson Laboratories (Stock Number 013757).” The error has been corrected in the HTML and PDF versions of the article.