WHERE <<function>> IN ... doesn't work

I have a query which is supposed to compare a result of a user defined function with a set of possible results
SELECT ... WHERE YEAR(w.date) IN (.......)

But I get the error:
[Syntax Error] line 0, col 49: Error: Expected Doctrine\ORM\Query\Lexer::T_IN, got '('

If I only compare the result of the function with a single value everything works as aspected:
SELECT ... WHERE YEAR(w.date) = 2011
.. works!

I also testet it with other functions like DATE_DIFF, etc. but always get the same error.