It does not...
You are kidding, right?
Article 2, Section 1, clause 5.
" No Person except a natural born Citizen, or a Citizen of the United States, at the time of the Adoption of this Constitution, shall be eligible to the Office of President; neither shall any Person be eligible to that Office who shall not have attained to the Age of thirty five Years, and been fourteen Years a Resident within the United States.
All the early presidents became "citizens" in 1776. Every single one of them.
They were therefore "citizens" at the adoption of the US Constitution. (1789)