A connector has an insulative housing, a plurality of terminals and a metal shell. The insulative housing has a base and a tongue formed on the base. The terminals are mounted in the insulative housing. The metal shell covers the insulative housing and has a top, a space and a plurality of fastening tabs. The fastening tabs are formed on the top of the metal shell and extend from the top into the space to tightly press against a plug connector. Each fastening tab has two connecting ends, a first section and a second section. The connecting ends are connected to the top of the metal shell. With the connecting ends connected to the metal shell instead of free ends, the fastening tabs would not inadvertently extend out of the metal shell.