It is shown by anomalous X-ray scattering that the absolute configuration of LiIO3, originally determined by Li Yin-yuan, Fan Hai-fu & Chia Shou-chuan [Sci. Sin. (1973), 16, 130-135], is incorrect, in accordance with the prediction of Glazer & Stadnicka [(1985). Submitted to J. Appl. Cryst.]. Measurements of the optical rotatory dispersion are also reported.