Nat. Med. 17, 245–246 (2011); published online 7 March 2011; corrected after print 7 April 2011

In the version of this article initially published, the authors omitted to mention that L. Scorrano and colleagues had previously shown increased Drp1 activity and mitochondrial fission in cellular models of Huntington's disease and would now like to cite this work (EMBO Mol. Med. 2, 490–503, 2010).The error has been corrected in the HTML and PDF versions of the article.