Dry Rot

[Nirghosa]

I have a kampilan I'm doing a minor restoration with and need some advice.
The handle was removed, reversed and reglued at some point long past.
Upon separating the handle and guard I found some minor dry rot inside the guard itself.
Any suggestions for stabilizing it before regluing?
Oh, and I plan to try a little cutting with this piece eventually. It's asking me to.