diff --git a/pkg/arvo/app/contact-store.hoon b/pkg/arvo/app/contact-store.hoon
index 8f26d409e7..0d564af1dd 100644
--- a/pkg/arvo/app/contact-store.hoon
+++ b/pkg/arvo/app/contact-store.hoon
@@ -131,7 +131,7 @@
       state(rolodex (~(del by rolodex) ship))
     ::
     ++  handle-edit
-      |=  [=ship =edit-field:store timestamp=date]
+      |=  [=ship =edit-field:store timestamp=@da]
       |^
       ^-  (quip card _state)
       =/  old  (~(got by rolodex) ship)
@@ -141,7 +141,7 @@
       ?:  =(old contact)
         [~ state]
       =.  last-updated.contact  timestamp
-      :-  (send-diff [%edit ship edit-field] =(ship our.bowl))
+      :-  (send-diff [%edit ship edit-field timestamp] =(ship our.bowl))
       state(rolodex (~(put by rolodex) ship contact))
       ::
       ++  edit-contact