In the August 2017 issue, the story “Breaking through: How researchers are gaining entry into barricaded bacteria” (Nat. Med. 23, 907–910, 2017) misstated that the pharmaceutical company Achaogen would be filing a New Drug Application with the FDA in 2018. The company will be filing an Investigational New Drug application. The article was also unclear in wording the progress of siderophore-conjugated antibiotics. Such antibiotics have made it to clinical trials, but none so far have made it to market. The errors have been corrected in the HTML and PDF versions of the article as of 23 August 2017.