Ohio Rev. Code Ann. § 2107.55

When a part of the estate of a testator descends to a child born or adopted, or to an heir designated, after the execution of the will, or to a child absent and reported to be dead at the time of execution of the will but later found to be alive, or to a witness to a will who is a devisee or legatee, the estate and the advancement made to the child, heir, or witness for all the purposes mentioned in section 2107.54 of the Revised Code shall be considered as if it had been devised to that child, heir, or witness and the child, heir, or witness shall be bound to contribute with the devisees and legatees, as provided by that section, and may claim contribution from them accordingly.