Nature Reviews Molecular Cell Biology 19, 175–191, (2018) https://doi.org/10.1038/nrm.2017.107 Published online 22 November 2017
In the original Fig. 2, sphingolipids on the endosomal and lysosomal membranes are facing the outside of these organelles. The correct orientation of these species should be towards the lumen, as shown in the corrected figure. The changes have been made in the HTML and PDF versions of the manuscript.