I'd say your better of using glucose rather than maltodextrin, glucose is absorbed a lot quicker and after training you need it asap.
I did this for quite a while and found it works great. You can also slow your pre bedtime shake down by mixing with milk if you don't want the expense of buying different proteins.

Oki Mark, thank you.

Im a diabetic and it would mean doing another injection though. Would glucose tablets be ok with a protein shake after a workout?

I suppose it depends on the amount. I usually throw 50g glucose in. When I use insulin I use 100g. Not sure about using glucose tabs I suppose there the same. Only reason I use glucose instead of maltodextrin is the release time.

The difference is actually not big at all between maltodextrin and glucose.

If you really want to make the absorbation of fast carbs quick, then you combine maltodextrin and dextrine (glucose), in a 50/50 split.

TC: You don't have to worry about this unless you really seek the ultimate fast carb drink after workout, maltodextrin and dextrine will both do fine on it's own.