Immobilization of Candida rugosa lipase (Amano AY-30) by adsorption onto Celite 545 led to a markedly improved performance of the enzyme: Firstly, the enzyme was almost completely resistant to deactivation by acetaldehyde, which is liberated as unavoidable by-product in acyl-transfer reactions with vinyl esters, and secondly, the enantioselectivity was enhanced up to three-fold.