Nat. Immunol. 13, 29–34 (2012); published online 20 November 2011; corrected after print 3 February 2012

In the version of this article initially published, the description of the Trpm2−/− mice in the first paragraph of the Online Methods was incomplete. That section should read as follows: “Trpm2−/− mice (obtained from B.A. Miller) were generated and originally provided by GlaxoSmithKline46. Another group has independently generated Trpm2−/− mice12; those were not used here.” The new reference (46) is as follows: Knowles, H. et al. Transient receptor potential melastatin 2 (TRPM2) ion channel is required for innate immunity against Listeria monocytogenes. Proc. Natl. Acad. Sci. USA 108, 11578–11583 (2011). The error has been corrected in the HTML and PDF versions of the article.