Neil Jenkins has withdrawn from the Wales side to play the US at Cardiff Arms Park tomorrow.
Flu victim Jenkins, Wales' record scorer with 498 points from 46 Tests, is replaced by Cardiff's Justin Thomas.
Pontypridd captain Jenkins filled the full back role against Australia and South Africa last month, having gone on as a replacement for Wayne Proctor when Wales were beaten 28-19 by the Wallabies.
Cardiff outside half Jonathan Davies, left out of the original selection in favour of young Swansea prospect Arwel Thomas, goes onto the bench.