Good on you for asking about it ahead of time! The first introduction is important. I found pretty good advice Here. After their original visit, be sure to protect the puppy with a crate in your home. Depending on their reaction to each other, let them smell and see each other so they get used to each other. You really should have no problem since your dog at home is really just a puppy. Be careful about rowdy play sessions, though. THe older pup might get too rambunctious and accidently hurt the little fella.
Good luck! And pictures, please!