We investigate the impact of currency factor on market integration. We compare integration indices estimated from international asset pricing models with and without real exchange risk. The theoretical expectation implies the integration measures should be similar when global currency premium and the sum of global and local currency premiums are small. Our empirical results support this proposition. We also examine the sensitivity of the Pukhthuatong and Roll (2009) R square to omitted currency factors. In general, currency risk does not affect the level and the dynamics of the integration measure except under crisis conditions.