This paper analyzes -ki nominalizations in Korean. We identify two types of the -ki nominalizations, NOM-ki and GEN-ki, with distinct morphosyntactic properties. We propose an analysis along the lines of Kratzer (1996) in which the nominalizer -ki selects verbal projections of different sizes (TP and vP) to account for the observed patterns. We argue against previous accounts of -ki nominalizations, showing either that important generalizations were missed or that there were flaws in the previous analyses. We propose a novel generalization for the two types of -ki nominalizations and propose an appropriate analysis. Some outstanding issues and implications are briefly discussed.