cannot type function argument in parser as it receives unicode subtypes

Cython/Compiler/Parsing.pxd

@@ -70,7 +70,7 @@ cdef bint check_for_non_ascii_characters(unicode string)
 cdef p_string_literal(PyrexScanner s, kind_override=*)
 cdef _append_escape_sequence(kind, builder, unicode escape_sequence, PyrexScanner s)
 @cython.locals(i=Py_ssize_t, size=Py_ssize_t, c=Py_UCS4)
-cdef list p_f_string(PyrexScanner s, unicode unicode_value, pos, bint is_raw)
+cdef list p_f_string(PyrexScanner s, unicode_value, pos, bint is_raw)
 @cython.locals(i=Py_ssize_t, size=Py_ssize_t, c=Py_UCS4, quote_char=Py_UCS4, NO_CHAR=Py_UCS4)
 cdef tuple p_f_string_expr(PyrexScanner s, unicode_value, pos, Py_ssize_t starting_index, bint is_raw)
 cdef p_list_maker(PyrexScanner s)