diff --git a/tools/widl/typegen.c b/tools/widl/typegen.c
index ce4d3d7da8..2709b682f9 100644
--- a/tools/widl/typegen.c
+++ b/tools/widl/typegen.c
@@ -2844,7 +2844,7 @@ static unsigned int process_tfs_stmts(FILE *file, const statement_list_t *stmts,
                                   write_typeformatstring_var(
                                       file, 2, NULL,
                                       type_function_get_rettype(func->type),
-                                      &v, TRUE, typeformat_offset),
+                                      &v, FALSE, typeformat_offset),
                                   file);
                 }