I prefer to use a splint attached with soft, rubber covered tie wire above and below the break.
Using tape can lead to excess moisture and fungal problems attacking the break.
By using a splint, the break stays dry and can completely heal itself and after about 4 weeks, the splint can then be removed all together.
I would also suggest re-potting very soon, those cups look awfully small for that sized plant to me.
Cheers, Organoman.