dht/dht.go | 5 +++++

diff --git a/dht/dht.go b/dht/dht.go
index 0b99d4ce76fb7f9bc0870f4cb0ac08365deb40f5..ed45395ca0d57648f7753e3fa999d11a8c4641eb 100644
--- a/dht/dht.go
+++ b/dht/dht.go
@@ -904,6 +904,11 @@ 		"y": "q",
 		"q": q,
 		"a": a,
 	}
+	// BEP 43. Outgoing queries from uncontactiable nodes should contain
+	// "ro":1 in the top level dictionary.
+	if s.config.Passive {
+		d["ro"] = 1
+	}
 	b, err := bencode.Marshal(d)
 	if err != nil {
 		return