I'd probably rivet it on as well, just to be safe.

Thanks for all the suggestions guys. When it comes down to it, I've got two masts. One is this punctured one. The other one is the one I use, its got a slight dent and bend just below the tang. It straightens out under shroud tension, but if I can repair the damaged punctured one, I'd rather do that, because its straighter.

Again, thanks for the suggestions. When I called hobie, they wanted to sell me a new mast.