There are multiple ways to potentially address this issue, though some are cleaner than others. You may wish to review Colorado Revised Statute Section 38-35-109 which covers affidavits relating to correcting a scrivener's error. You can access statutes for free at http://www.lexisnexis.com/hottopics/Colorado/

It is likely this is part of some estate planning, so you are well advised to involve counsel to ensure that your efforts are not in vain.

Hope this helps.