The Lielmezs-Merriman (LM) modification of the Peng-Robinson (PR) equation of state has been expanded to vapor-liquid equilibrium predictions of binary mixtures. The predicted bubble point pressures and vapor mole fractions have been compared with the results calculated by the Redlich-Kwong-Soave (RKS), Peng-Robinson (PR) equations and F-function modifications of RKS (FRKS, F-RKS) and PR (FPR, F-PR) equations.