We have assembled 560 recent measurements from the literature of distances of Galactic globular clusters and found revised distance estimates for 154 of the 157 clusters in the McMaster catalogue [Harris, 2010 edition, Cat. VII/202]. We find a trough in the X-distribution at the Galactic centre, and symmetries corresponding to the structure of the bar. These features indicate a distance, R_0_=7.4+/-0.2(stat)+/-0.2(sys)kpc, only a little higher than Bica et al.'s (2006, Cat. J/A+A/450/105) estimate.