Creating curve deformers on my characters eyebrows causing pivot to move

Hi! I’m having some trouble rigging the eyebrows on my character.I’m trying to apply a curve deformer to the eyebrows, and when I do the pivot I set for the eyebrow moves off the eyebrow. I can’t set it back to it’s original position without affect the other frames of my characters eyebrows in the turn. I’ve tried adding a KO, but my eyebrows have nothing else connected to it so that doesn’t seem to work. Any ideas for how I can fix this?