A simple method of deformational correction for the N.M.R. spectral parameters of molecules dissolved in liquid crystals is described. The method is applicable to the different isotopically substituted derivatives of the molecules belonging to the cubic point groups. Its validity is verified for the dipolar and quadrupolar couplings observed in the molecules CH4, CD4and CH3D dissolved in the liquid crystals Merck Phase IV, Merck ZLI 1167 and their mixtures.