Okla. Stat. tit. 60, § 60-1604.14: Reformation to correct mistakes

The court may reform the terms of a trust, even if unambiguous,

to conform the terms to the settlor's intention if it is proved by

clear and convincing evidence what the settlor's intention was and

that the terms of the trust were affected by a mistake of fact or

law, whether in expression or inducement.