In our previous work [S.B. Kiselev, J.F. Ely, Fluid Phase. Equilib. 222-223 (2004) 149], we developed a generalized cubic (GC) EoS for pure fluids, which incorporates non-analytic scaling laws in the critical region and reproduces the thermodynamic properties of pure fluids with high accuracy, including the asymptotic scaling behavior of the isochoric heat capacity in the one- and two-phase regions. However, it appears that in some cases the GC EoS can give unphysical behavior when extrapolated to high temperatures and densities. In this work, we present a modification of the generalized cubic EoS, which in the critical region is physically equivalent to the GC EoS developed earlier, but is more reliable in its extrapolation to high temperatures. (c) 2006 Elsevier B.V. All rights reserved.