Wood filler or glue for small fracture after nailing?

Question

I stupidly neglected to pre-drill a hole before nailing into a thin bit of wood, causing a small (hairline, inch each way) split.

I believe it needs only a cosmetic repair - and it would be hard to clamp, putting me off expanding glues.

The nail needs to stay in place, but not be glued in place.

Should I use filler, or glue?

Answer 1

If it is not enough concern to make it worth replacing, put a little filler in it.

Answer 2

If the nail is holding this thin piece in place I would use wood glue over filler, filler may not hold the split together where wood glue would.