Nat. Immunol. 18, 1094–1103; published online 28 August 2017; corrected after print 20 September 2017

In the version of this article initially published, the label 'siDDX46' in the key to Figure 5g is incorrect. That label should read 'siALKBH5'. The error has been corrected in the HTML and PDF versions of this article.