Correction to: Nature online 11 September 2019

In this Letter, we omitted a relevant reference1 that was published during the latter stages of manuscript preparation. This study documents the necessity of SLC19A1 for STING activation by extracellular cyclic dinucleotides. We regret not citing this reference to highlight its relevance. The original Letter has not been corrected online.

1.Ritchie, C., Cordova, A. F., Hess, G. T., Bassik, M. C. & Li, L. SLC19A1 is an importer of the immunotransmitter cGAMP. Mol. Cell 75, 372–381.e5 (2019).