  We calculate the next-to-leading order QCD corrections to the perturbative
term in the operator product expansion of the spectral functions of light
tetraquark currents. By using also configuration space methods we keep the
momentum space four-loop calculation to a manageable level. We find that the
next-to-leading order corrections to the perturbative term are large and can
amount to $O(100\%)$. The corrections to the corresponding Borel sum rules,
however, are small since the nonperturbative condensate contributions dominate
the Borel sum rules.
