The adiabatic correction has been computed for the ground state of the hydrogen molecule at R = 1.4 bohr using the formula suggested by Handy - that avoids the specification of the relative coordinates - and Gaussian geminal wavefunctions. It is demonstrated that this method allows one to obtain easily very accurate results. The computed value for H-2 has an accuracy of 10(-4) cm(-1). (C) 1997 Published by Elsevier Science B.V.