This work will focus on analyzing the Korean verb, mac ‘to be hit’, which is the suppletive passive form of ttayli ‘to hit’, within the framework of Distributed Morphology (Halle & Marantz 1993). In addition, this work will demonstrate the morphology-syntax mismatch between mac and the usual i/hi/li/ki-type of passive form used in Korean: mac and the i/hi/li/ki-type of passive form show the same syntactic patterns, whereas they are realized in distinct morphological structures. With the goal of explaining this mismatch, we will provide a postsyntactic morphological operation known as fusion proposed by Halle & Marantz (1993, 1994).