The 36-year-old father of eight children -- a set of twins and sextuplets with his ex-wife Kate -- said he and his girlfriend, Liz Jannetta, have no plans for children, UsMagazine.com reported.
"We can't have more kids. Yeah, I'm fixed," Jon Gosselin told Williams Tuesday.
He did not say exactly when he underwent the procedure.
Jon and Kate Gosselin divorced in 2009.