Punnett square for chances of a son having blood clotting?

In humans, the condition for normal blood clotting (H) dominates the condition for non clotting (h- hemophilia). Both alleles are linked to the X chromosome. A male hemophiliac marries a woman who is a carrier for this condition. (In this respect, a carrier is a woman who has and allele for normal blood clotting and an allele for hemophilia). If they have a son, what are the chances he will be normal for blood clotting