diff --git a/xenomorph/xenomorph/struct.rkt b/xenomorph/xenomorph/struct.rkt
index 9f2ebeb7..e045062d 100644
--- a/xenomorph/xenomorph/struct.rkt
+++ b/xenomorph/xenomorph/struct.rkt
@@ -1,4 +1,4 @@
-#lang racket/base
+#lang debug racket/base
 (require racket/dict
          racket/class
          racket/sequence
@@ -66,6 +66,7 @@ https://github.com/mbutterick/restructure/blob/master/src/Struct.coffee
                               x:pointer-size-key 0)) 
       (hash-set! parent x:pointer-offset-key (+ (pos port) (size field-data parent #f))) 
       (for ([(key type) (in-dict @fields)])
+        #R (list key 'in-struct)
         (send type encode (dict-ref field-data key) port parent))
       (for ([ptr (in-list (hash-ref parent x:pointers-key))])
         (match ptr
diff --git a/xenomorph/xenomorph/versioned-struct.rkt b/xenomorph/xenomorph/versioned-struct.rkt
index 6a29a4bd..758c376c 100644
--- a/xenomorph/xenomorph/versioned-struct.rkt
+++ b/xenomorph/xenomorph/versioned-struct.rkt
@@ -80,6 +80,7 @@ https://github.com/mbutterick/restructure/blob/master/src/VersionedStruct.coffee
       (unless (andmap (λ (key) (member key (dict-keys field-data))) (dict-keys fields))
         (raise-argument-error 'x:versioned-struct-encode (format "hash that contains superset of xversioned-struct keys: ~a" (dict-keys fields)) (dict-keys field-data)))
       (for ([(key type) (in-dict fields)])
+        #R (list key 'in-verseioned-struct)
         (send type encode (dict-ref field-data key) port parent))
       (for ([ptr (in-list (dict-ref parent x:pointers-key))])
         (match ptr