Adding alcohol boost during fermentation?

So i got a mini mash kit from AHS, it is an american Hefeweizen which i added copious amounts of orange and orange zest. Non the less i miscalculated by the amount of water i had put in the fermenter, so i ended up not putting in all of the wort i had boiled (though only by a little bit).

However my question is; i have a 1% alcohol boost lying around from AHS and wanted to know if i can boil this up with some water and add it now?

It also just started fermenting this morning.

Sure you can.

Forrest