  It has recently been argued that the confining vacua of Yang-Mills theory in
the far infrared can have topological degrees of freedom given by magnetic
$\mathbb{Z}_q$ gauge field, both in the non-supersymmetric case and in the N=1
supersymmetric case. In this short note we give another piece of evidence by
computing and matching the supersymmetric index of the pure super Yang-Mills
theory both in the ultraviolet and in the infrared.
