diff --git a/pkg/arvo/app/graph-store.hoon b/pkg/arvo/app/graph-store.hoon
index ffc231736..5d901f781 100644
--- a/pkg/arvo/app/graph-store.hoon
+++ b/pkg/arvo/app/graph-store.hoon
@@ -183,7 +183,9 @@
           =/  =validated-portion:store
             [parent-hash author.p time-sent.p contents.p]
           =/  =hash:store  `@ux`(sham validated-portion)
-          ?~  hash.p  node
+          ?~  hash.p  node(signatures.post *signatures:store)
+          ~|  "signatures do not match the calculated hash"
+          ?>  (are-signatures-valid:sigs signatures.p hash now.bowl)
           ~|  "hash of post does not match calculated hash"
           ?>  =(hash u.hash.p)
           node