Doomblade Rapier is non-magical

I crafted the Doomblade Rapier and noticed that it was resisted by wights and such creatures, while my Doomblade Greatsword was not. So I checked my inventory and found that the Doomblade Rapier does not have the "Magical" tag and doesn't do magical damage. Since the Doomblade Greatsword does have the "Magical" tag, I assume this is an oversight for the rapier.