  Let $R$ be a ring with pseudo-involution, $\mathfrak L$ be an odd form
parameter, $\mathrm U(2n,\,R,\,\mathfrak L)$ be an odd hyperbolic unitary
group, $\mathrm{EU}(2n,\,R,\,\mathfrak L)$ be it elementary subgroup and
$\mathrm{StU}(2n,\,R,\,\mathfrak L)$ be an odd unitary Steinberg group. We
compute the Schur multipliers of $\mathrm{StU}(2n,\,R,\,\mathfrak L)$ and
$\mathrm{EU}(R,\,\mathfrak L)$.
