diff --git a/xfr.go b/xfr.go
index 022abdf5..7655c1b1 100644
--- a/xfr.go
+++ b/xfr.go
@@ -69,6 +69,12 @@ func (w *reply) axfrIn(q *Msg, c chan *Envelope) {
 				return
 			}
 			first = !first
+			// only one answer that is SOA, receive more
+			if (len(in.Answer) == 1) {
+				w.tsigTimersOnly = true
+				c <- &Envelope{in.Answer, nil}
+				continue
+			}
 		}
 
 		if !first {