The Comment 'Melting glaciers bring energy uncertainty' (Nature 502, 617–618; 2013) wrongly said that Himalayan glaciers lost 174 gigatonnes of water each year for the period 2003–09. This was not the annual rate, but the total amount for that period. And the Indus depends on glacial waters for up to half of its flow, not half of its flow, as stated.