diff --git a/syndicate/dataspace.rkt b/syndicate/dataspace.rkt
index d19b127..f359cd8 100644
--- a/syndicate/dataspace.rkt
+++ b/syndicate/dataspace.rkt
@@ -259,7 +259,7 @@
 
     (when (pair? parent-fid)
       (define pf (lookup-facet ds parent-fid))
-      (when pf (set-facet-children! (set-remove (facet-children pf) fid))))
+      (when pf (set-facet-children! pf (set-remove (facet-children pf) fid))))
 
     (hash-remove! (dataspace-facets ds) fid)