Didn't start with enough water in primary fermenter

[grimstuff]

Hi everyone, just had a quick question. I just finished my first brewing experience, the wort is chilled, the yeast is pitched, and its been sitting in a bucket with an airlock in place for about an hour. A few minutes ago, I realized I didn't top off the fermenter to make it a full 5 gallons. I started boiling with 5 gallons, and had some evaporation loss, so it's probably about 4.5 gallons. Is it too late to add some water? Or should I just leave it be?

I'd appreciate any advice. Thanks!

 

[Revvy]

Go ahead and top off.

 

[hoppymonkey]

+1. It's just started. Even help oxygenate it at this point

 

[grimstuff]

Thanks for the lightning fast responses! I went ahead and topped it off to around 5.2 gallons or so, couldn't quite tell.