  The recoil retardation effect in the $K^-d$ scattering length is studied.
Using the non-relativistic effective field theory approach, it is demonstrated
that a systematic perturbative expansion of the recoil corrections in the
parameter $\xi=M_K/m_N$ is possible in spite of the fact that $K^-d$ scattering
at low energies is inherently non-perturbative due to the large values of the
$\bar KN$ scattering lengths. The first order correction to the $K^-d$
scattering length due to single insertion of the retardation term in the
multiple-scattering series is calculated. The recoil effect turns out to be
reasonably small even at the physical value of $M_K/m_N\simeq 0.5$.
