Errors are discovered regarding the published equation coefficients of Wang and co-workers {J. Chem. Thermodynamics 94 (2016) 110-118} for mathematically describing the solubility behaviour of thiourea in (methanol + ethanol) mixtures and methanol + n-propanol mixtures using the lambda-h equation. The calculated values using the published equation coefficients do not correctly describe the computed solubility data as stated in the published paper. Larger differences are found between our back-calculated data and those reported in the authors' published paper. Furthermore, the equation parameters are re-regressed. (C) 2018 Elsevier Ltd.