Any advice on fixing gravy that turned out too sweet?

[Rhiannon12866]

I made pot roast, which I have made many times, cooked it with small potatoes and baby carrots, as usual, then added flour to make the gravy. The gravy is usually the best part, but for some reason it's awfully sweet. The only thing I can think of is that I used too many carrots, since they're always a hit. Any advice? :-(