Mo. Rev. Stat. § 442.480
Current with changes from the 2023 Legislative Session
Where a remainder in lands or tenements, goods or chattels, shall be limited, by deed or otherwise, to take effect on the death of any person without heirs, or heirs of his body, or without issue, or on failure of issue, the words "heirs" or "issue" shall be construed to mean heirs or issue living at the death of the person named as ancestor.
§ 442.480, RSMo
RSMo 1939 § 3499