diff --git a/syndicate/dataspace.rkt b/syndicate/dataspace.rkt
index e2882a1..d844c9c 100644
--- a/syndicate/dataspace.rkt
+++ b/syndicate/dataspace.rkt
@@ -111,10 +111,15 @@
                )
   #:methods gen:custom-write
   [(define (write-proc f p mode)
+     (local-require (only-in racket/string string-join))
+     (define (facet-id-chain f)
+       (if f
+           (cons (number->string (facet-id f)) (facet-id-chain (facet-parent f)))
+           '()))
      (fprintf p "#<facet ~a ~v ~a>"
               (actor-id (facet-actor f))
               (actor-name (facet-actor f))
-              (facet-id f)))])
+              (string-join (facet-id-chain f) ":")))])
 
 (struct endpoint (id ;; EID
                   [assertion #:mutable] ;; Assertion