Privation of good

I've always heard that the idea of "privation of good" was something Augustine came up with. (Summary: evil is not a thing in itself, but only the absence of good-- like how darkness is the absence of light.) But 300 years earlier, Epictetus was saying:

"As a mark is not set up for the sake of missing the aim, so neither does the nature of evil exist in the world." (Enchiridion, 27)

Isn't that the same idea?