diff --git a/go/delivery/placement_proposal.go b/go/delivery/placement_proposal.go
index bb32776..4d774ab 100644
--- a/go/delivery/placement_proposal.go
+++ b/go/delivery/placement_proposal.go
@@ -364,6 +364,9 @@ type PlacementProposal struct {
 	// Again is when `again` asked the holder to judge it now and raise its ask again (§10); the holder does once per
 	// value.
 	Again time.Time `json:"again,omitempty"`
+	// Withdrawn is who withdrew it and why (`withdraw`, §2): the holder then deletes it and its candidates and says
+	// placement-withdrawn, which only the holder's process can say on its stream.
+	Withdrawn string `json:"withdrawn,omitempty"`
 }
 
 // Nodes is every node whose key the proposal changes, sorted.