During the parameterization of SM12, it was pointed out that the largest deviation was observed for the self-solvation free energy of water, which was overly negative by 1 to 2 kcal/mol (or 1.7 to 3.4 RT in dimensionless units) using all methods, and the solvation free energy of the water dimer in water was overly negative by 3 to 4 kcal/mol (or 5.1 to 6.8 RT in dimensionless units) using all methods . We likewise observe large errors for the self-solvation free energy of water, although our predictions are slightly more negative. The reference value of ∆G self i,i / (RT) for water is -10.689, while we predict -14.473, -15.485, and -15.024 with SM12, SM8, and SMD, respectively. This would correspond to predicting a vapor pressure that is too small, and that we are over estimating the affinity of water for the liquid phase or equivalently the strength of the water-water interactions.