  Recently, Pavese and Smaldore constructed graphs cospectral to $NU(5, q^2)$
for $q>2$. We show that their construction works for $NU(n, q^2)$, $n \geq 5$.
Hence, none of the graphs $NU(n, q^2)$, $n \geq 5$, are determined by their
spectrum.
