Correction to: Nature Structural & Molecular Biology https://doi.org/10.1038/s41594-021-00619-0, published online 22 June 2021.

In the version of this article initially published, in the first sentence of paragraph three in the Introduction, it was incorrectly stated that the SARS-CoV-2 genome encodes the viroporin ORF8a. The correct version of the sentence is “3a has been proposed to form an ion channel and is one of two putative viroporins encoded by the SARS-CoV-2 genome together with the envelope protein E (SARS-CoV-1 encodes an additional putative viroporin, ORF8a).” The error has been corrected in the HTML and PDF versions of the article.