It will be fine, just don't put tape on it, this can cause "sweating", which can then lead to fungal attack.
Place some sticks in the pot and tie the branches either side of the split to the sticks instead, this way the branches are braced against further splitting of the main stem and the wound/split stays dry and unattractive to fungus.
It is a bit like in humans - after initial healing you have to take the bandage off and let the wound dry out to heal, otherwise infection can set in to attack an overly moist wound.
Hope this helps, Organoman.