diff --git a/p2p/discover/udp.go b/p2p/discover/udp.go
index 1213c12c82..ab3559ad82 100644
--- a/p2p/discover/udp.go
+++ b/p2p/discover/udp.go
@@ -402,7 +402,7 @@ func encodePacket(priv *ecdsa.PrivateKey, ptype byte, req interface{}) ([]byte,
 // readLoop runs in its own goroutine. it handles incoming UDP packets.
 func (t *udp) readLoop() {
 	defer t.conn.Close()
-	buf := make([]byte, 4096) // TODO: good buffer size
+	buf := make([]byte, 1280)
 	for {
 		nbytes, from, err := t.conn.ReadFromUDP(buf)
 		if err != nil {