Nat. Cell Biol. 14, 355–365 (2012); published online 18 March 2012; corrected after print 18 April 2012

In the version of this Article initially published online and in print, a reference was inadvertently omitted. On page 358, directly following the text “Strikingly, however, the HO break next to telomeric repeats is not, and repair is suppressed to the same extent as in DNA ligase 4-deleted (lig4Δ) strains used as a control (Fig. 6b)”, a new sentence has been added: “This result is consistent with a previously reported reduction in survival when telomeric repeats are inserted next to an I-SceI-induced DSB (ref. 35)”.

The omitted reference has now been added to the reference list:

35. Marcand, S., Pardo, B., Gratias, A., Cahun, S. & Callebaut, I. Multiple pathways inhibit NHEJ at telomeres. Genes Dev. 22, 1153–1158 (2008).

References 35–55 have been renumbered as 36–56, respectively.

This error has been corrected in both the HTML and PDF versions of the Article.