Reporting non-qualified 529 Distribution <$600

I received a non-qualified distribution from an old 529 plan closed years ago.  Since it was less than $600, no form was issued and I am unsure how to properly report it.  The accompanying letter mentions 1099 Miscellaneous but this seems a little vague - I'm thinking this would have been reported on a 1099-Q.  The beneficiary has long ago finished school and there are no education costs to offset the funds.