JCR SQL2 like query with escape not working

Question

This query runs fine:

    SELECT n.* FROM [nt:unstructured] AS n
    WHERE n.property LIKE 'value'

But this query does not:

    SELECT n.* FROM [nt:unstructured] AS n
    WHERE n.property LIKE 'value' ESCAPE '#'

The error isn't helpful either:

    Query: SELECT n.* FROM [nt:unstructured] AS n WHERE n.property LIKE 'value' ESCAPE(*)'#'; expected: <end>

So what gives?