diff --git a/xenomorph/xenomorph/redo/pointer.rkt b/xenomorph/xenomorph/redo/pointer.rkt
index d2e07762..afca539f 100644
--- a/xenomorph/xenomorph/redo/pointer.rkt
+++ b/xenomorph/xenomorph/redo/pointer.rkt
@@ -86,7 +86,7 @@ https://github.com/mbutterick/restructure/blob/master/src/Pointer.coffee
                          [else (error 'unknown-pointer-style)])]
                 [(type val) (resolve-void-pointer (xpointer-type xp) val)])
     (when (and val ctx)
-      (dict-set! ctx 'pointerSize (and (dict-ref ctx 'pointerSize)
+      (dict-set! ctx 'pointerSize (and (dict-ref ctx 'pointerSize #f)
                                        (+ (dict-ref ctx 'pointerSize) (size type val parent)))))
     (size (xpointer-offset-type xp))))
 
diff --git a/xenomorph/xenomorph/redo/test/array-test.rkt b/xenomorph/xenomorph/redo/test/array-test.rkt
index c5c30eae..f92cd85b 100644
--- a/xenomorph/xenomorph/redo/test/array-test.rkt
+++ b/xenomorph/xenomorph/redo/test/array-test.rkt
@@ -3,6 +3,7 @@
          "../helper.rkt"
          "../array.rkt"
          "../number.rkt"
+         "../pointer.rkt"
          sugar/unstable/dict)
 
 #|
@@ -85,7 +86,6 @@ https://github.com/mbutterick/restructure/blob/master/test/Array.coffee
  "encode length as number before array"
  (check-equal? (encode (+xarray uint8 uint8) '(1 2 3 4) #f) (bytes 4 1 2 3 4)))
 
-;; todo: reinstate pointer test
-#;(test-case 
+(test-case 
    "add pointers after array if length is encoded at start"
-   (check-equal? (encode (+xarray (+Pointer uint8 uint8) uint8) '(1 2 3 4)) (bytes 4 5 6 7 8 1 2 3 4)))
\ No newline at end of file
+   (check-equal? (encode (+xarray (+xpointer uint8 uint8) uint8) '(1 2 3 4) #f) (bytes 4 5 6 7 8 1 2 3 4)))
\ No newline at end of file