Okla. Stat. tit. 22, § 22-384: Names of witnesses endorsed on indictment

When an indictment is found, the names of the witnesses examined

before the grand jury must be endorsed thereon before the same is

presented to the court, but a failure to so endorse the said names

shall not be sufficient reason for setting aside the indictment if

the district attorney or prosecuting officer will within a

reasonable time, to be fixed by the court, endorse the names of the

witnesses for the prosecution on the indictment. Provided that the

names of witnesses examined before the grand jury on matters not

concerning the indictment in question shall not be endorsed on the

indictment relative to such case. The court or judge may, at any

time, direct the names of additional witnesses for the prosecution

to be endorsed on the indictment, and shall order that such names be

furnished to the defendant or his counsel.