diff --git a/federationapi/routing/send.go b/federationapi/routing/send.go
index fad23a5c..472775ac 100644
--- a/federationapi/routing/send.go
+++ b/federationapi/routing/send.go
@@ -381,7 +381,7 @@ func (t *txnReq) processTransaction(ctx context.Context) (*gomatrixserverlib.Res
 	if c := len(results); c > 0 {
 		util.GetLogger(ctx).Infof("Processed %d PDUs from %v in transaction %q", c, t.Origin, t.TransactionID)
 	}
-	return &gomatrixserverlib.RespSend{PDUs: results}, nil
+	return &gomatrixserverlib.RespSend{}, nil
 }
 
 func (t *inputWorker) run() {