I accidentally sold a stock and bought it back. Any way to avoid capital gains?

I made a stupid mistake and instead of selling stocks from my Schwab IRA account which I meant to do, I accidentally sold them from my regular account. I bought them back right away, but is there any way to avoid the capital gains tax? The gain is going to be quite large because the first batch of these shares was purchased many years ago. I believe it was sold using FIFO because it defaults to that. Is there any way to use LIFO when filing my taxes, or am I pretty much screwed and going to have to report this sale with a low cost basis?