How to filter `Where null`

[baconcheese113]

I'm using Prisma 1 with Prisma Binding and a Postgresql DB.

Is there a way to find rows where a field is null?

This is what I would expect, but doesn't appear to be supported:

prisma.query.matches({ where: { endedAt: null } }, info)

[sevdok]

Same problem. How can i select records with null?
Tried "where: { prop: { equals: null } }" but still result is empty list, no errors