How to escape string for SQLite FTS query

I'm trying to perform a SQLite FTS query with untrusted user input. I do not want to give the user access to the query syntax, that is they will not be able to perform a match query like foo OR bar AND cats. If they tried to query with that string I would want to interpret it as something more like foo \OR bar \AND cats.

There doesn't seem to be anything built in to SQLite for this, so I'll probably end up building my own escaping function, but this seems dangerous and error-prone. Is there a preferred way to do this?