We have a screen door on our 1982 Scamp
, but I didn't even know there was supposed to be a peg holding it in! Ours doesn't have that, or if it did, it wore off/broke off long ago. It has never been a problem. If we aren't using it, it's strapped to the closet, if we are, it's closed and sits where it's supposed to! Sorry I can't be of more help!