I forgot to knit a yo

I’m working on a blanket. It has a bunch of YOs. On the row after the YOs, I have to knit them. I realize on the row after that I forgot to knit one of those YOs on the previous row. How can I fix that?

Just pick up the yarn between the stitches where it should be. It might be a little tighter and smaller than the others, but after you wash or block it probably not so noticeable.