The kinetics of crystallization of a Fe-based multicomponent metallic glass Fe67CO18B14Si1, commercially known as 2605CO, is studied using modulated differential scanning calorimetry (MDSC) which still remains much less explored for the study of crystallization kinetics. The modified Kissinger equation and the one given by Matusita and Sakka for the non-isothermal crystallization have been employed to analyze the crystallization data at various heating rates. The effect of non-linear heating on the kinetics of crystallization has been discussed. It has been found that the dimensionality of crystallization is heating rate independent in case of DSC while in case of MDSC it is heating rate dependent. (C) 2004 Elsevier B.V. All rights reserved.