Nature 469, 221–225 (2011)

On page 2 of the print and PDF version of this Letter, there are two citations to Fig. 2f. The first citation to Fig. 2e, f, which refers to active IL-1β in the culture supernatant after knockdown of beclin 1 and ATG5, should instead be to Fig. 2d, e; the second citation to Fig. 2f, which refers to the stimulation of cells with MSU or nigericin, should be to Fig. 2e. These have been corrected in the HTML version of the manuscript.