diff --git a/tools/chibi-ffi b/tools/chibi-ffi
index cd8c4ca7..4ff4e6de 100755
--- a/tools/chibi-ffi
+++ b/tools/chibi-ffi
@@ -650,8 +650,6 @@
     (cond
      ((number? len)
       len)
-     ((memq 'result (type-array x))
-      "sexp_unbox_fixnum(res)")
      (else
       (and func
            (symbol? len)