Unless the thing broke all the way through, next time you may want to first try and repair it. You would be amazed at how some badly damaged stems can still stay alive and heal. Recently I tied up a couple of branches that had snapped at least 75 percent of the way through and they are doing very good. I had another main stalk break almost all the way through and I repaired that fully as well early in the year.
I splint it and tie up or brace the upper part above the break and then loosely tape over the break. If in a day or two the leaves are all wilting and you know it won't rebound, you can always harvest it then.
I don't know if you bud is going to root or continue to grow. Me personally if I were in this dilemna, I would watch it very closely and at the first sign that it won't make it, I'd go ahead and trim and cure it so it doesn't go completely to waste.