An electrical connector includes: an insulative housing having a rear base and a front tongue; an upper and lower rows of contacts mounted in the insulative housing and exposed to the tongue; a shielding shell enclosing the insulative housing; and a sealing element sealing a junction between the insulative housing and the shielding shell; wherein the shielding shell includes a rear step located immediately adjacent the junction and a recess at a corner of the step, and the base of the insulative housing includes a step fitting the rear step of the shielding shell.