The story 'Synchrotron cuts' ( Nature 468, 736; 2010) incorrectly gave the three-year budget of the European Synchrotron Radiation Facility as €86.8 million. That number is the facility's annual budget. The brief also said that cuts to "operating time" would be made. To clarify, two existing beam lines will be closed, but the accelerator will continue to run on its normal schedule.