diff --git a/xenomorph/xenomorph/helper.rkt b/xenomorph/xenomorph/helper.rkt
index e1ca83a6..0ee715db 100644
--- a/xenomorph/xenomorph/helper.rkt
+++ b/xenomorph/xenomorph/helper.rkt
@@ -53,8 +53,8 @@
       (define encode-result (inner (error 'xxencode-not-augmented) xxencode (pre-encode val) output-port parent))
       (when (bytes? encode-result) (write-bytes encode-result output-port)))
     
-    (define/pubment (xxsize [val #f] [parent #f] . _)
-      (define size (inner 0 xxsize val parent))
+    (define/pubment (xxsize [val #f] [parent #f] . args)
+      (define size (inner 0 xxsize val parent . args))
       (unless (and (integer? size) (not (negative? size)))
         (raise-argument-error 'size "nonnegative integer" size))
       size)
diff --git a/xenomorph/xenomorph/test/struct-test.rkt b/xenomorph/xenomorph/test/struct-test.rkt
index ea3443cb..02baba22 100644
--- a/xenomorph/xenomorph/test/struct-test.rkt
+++ b/xenomorph/xenomorph/test/struct-test.rkt
@@ -75,7 +75,6 @@ https://github.com/mbutterick/restructure/blob/master/test/Struct.coffee
                             'nameLength uint8
                             'name (+xstring 'nameLength)
                             'age uint8))
-   ;(set-pre-encode! struct (λ (val) (dict-set! val 'nameLength (string-length (dict-ref val 'name))) val))
    (encode struct (mhasheq 'name "roxyb" 'age 21))
    (check-equal? (get-output-bytes (current-output-port)) #"\x05roxyb\x15")))