  We present a derivation of quantum kinetic theory for massive spin-1
particles from the Wigner-function formalism up to first order in an
$\hbar$-expansion, including a general interaction term. Both local and
nonlocal contributions are computed in a covariant fashion. It is shown that,
up to first order in $\hbar$, the collision term takes the same form as in the
case of spin-1/2 particles.
