Not really. The stop is broken off. But, there are quickie work-arounds to try while you look for a permanent solution. You just need something to stop the cable housing from pulling through so the derailleur can shift. One simple way would be to wrap electrical tape (or some other kind) about 1/8" thick around the cable housing just large enough so that it can't pull up through the hole. Or some kind of clip maybe. It's the stop that's missing, not the guide, so you just need a way to stop the cable housing. Maybe a twist of heavy gage wire around the housing at that point.