Okla. Stat. tit. 22, § 22-304: Information may be amended

An information may be amended in matter of substance or form at

any time before the defendant pleads, without leave, and may be

amended after plea on order of the court where the same can be done

without material prejudice to the right of the defendant; no

amendment shall cause any delay of the trial, unless for good cause

shown by affidavit.