Automatic meromorphy in non-archimedean geometry

In this text we prove that if X is a reduced non-archimedean analytic space and f is a analytic function on a dense Zariski-open subspace of X whose zero-locus is closed in X, then f is a meromorphic function on X. As a corollary, we deduce that every invertible analytic function on the analytification of a reduced scheme of finite type over an affinoid algebra is algebraic.