diff --git a/beacon-chain/p2p/options.go b/beacon-chain/p2p/options.go
index 031017a08329..7685b91a3c19 100644
--- a/beacon-chain/p2p/options.go
+++ b/beacon-chain/p2p/options.go
@@ -62,8 +62,8 @@ func (s *Service) buildOptions(ip net.IP, priKey *ecdsa.PrivateKey) []libp2p.Opt
 		libp2p.UserAgent(version.BuildData()),
 		libp2p.ConnectionGater(s),
 		libp2p.Transport(tcp.NewTCPTransport),
-		libp2p.Muxer("/mplex/6.7.0", mplex.DefaultTransport),
 		libp2p.DefaultMuxers,
+		libp2p.Muxer("/mplex/6.7.0", mplex.DefaultTransport),
 	}
 
 	options = append(options, libp2p.Security(noise.ID, noise.New))
diff --git a/beacon-chain/p2p/options_test.go b/beacon-chain/p2p/options_test.go
index a106527d0497..e1a8bf67508f 100644
--- a/beacon-chain/p2p/options_test.go
+++ b/beacon-chain/p2p/options_test.go
@@ -123,7 +123,7 @@ func TestDefaultMultiplexers(t *testing.T) {
 	err = cfg.Apply(append(opts, libp2p.FallbackDefaults)...)
 	assert.NoError(t, err)
 
-	assert.Equal(t, protocol.ID("/mplex/6.7.0"), cfg.Muxers[0].ID)
-	assert.Equal(t, protocol.ID("/yamux/1.0.0"), cfg.Muxers[1].ID)
+	assert.Equal(t, protocol.ID("/yamux/1.0.0"), cfg.Muxers[0].ID)
+	assert.Equal(t, protocol.ID("/mplex/6.7.0"), cfg.Muxers[1].ID)
 
 }