Mo. Rev. Stat. § 287.440
Where recovery is denied to any person in a suit brought at law or in admiralty to recover damages in respect of bodily injury or death on the ground that the person was an employee and the defendant was an employer subject to and within the meaning of this chapter, or when recovery is denied to any person in an action brought under the provisions of a workers' compensation law of any other state or jurisdiction on the ground that the person was an employee under and subject to the provisions of this chapter, the limitation of time prescribed in section 287.430 shall begin to run from the date of the ultimate termination or abandonment of such suit or compensation proceeding, when such suit or compensation proceedings are filed within two years after the filing by the employer of the report of injury or death complained of, or in case payments have been made on account of the injury or death, within two years from the date of the last payment.
§ 287.440, RSMo