diff --git a/config_test.go b/config_test.go
index 6383a9900..765580749 100644
--- a/config_test.go
+++ b/config_test.go
@@ -24,14 +24,16 @@ func TestConfigToFlatMap(t *testing.T) {
 	cfg.DB.Etcd.Pass = testPassword
 	cfg.DB.Postgres.Dsn = testPassword
 
-	// Set a deprecated field.
+	// Set deprecated fields.
 	cfg.Bitcoin.Active = true
+	cfg.Tor.V2 = true
 
 	result, deprecated, err := configToFlatMap(cfg)
 	require.NoError(t, err)
 
 	// Check that the deprecated option has been parsed out.
 	require.Contains(t, deprecated, "bitcoin.active")
+	require.Contains(t, deprecated, "tor.v2")
 
 	// Pick a couple of random values to check.
 	require.Equal(t, DefaultLndDir, result["lnddir"])
diff --git a/lncfg/tor.go b/lncfg/tor.go
index f41d7b09c..932d5dfc9 100644
--- a/lncfg/tor.go
+++ b/lncfg/tor.go
@@ -12,7 +12,7 @@ type Tor struct {
 	Control                     string `long:"control" description:"The host:port that Tor is listening on for Tor control connections"`
 	TargetIPAddress             string `long:"targetipaddress" description:"IP address that Tor should use as the target of the hidden service"`
 	Password                    string `long:"password" description:"The password used to arrive at the HashedControlPassword for the control port. If provided, the HASHEDPASSWORD authentication method will be used instead of the SAFECOOKIE one."`
-	V2                          bool   `long:"v2" description:"Automatically set up a v2 onion service to listen for inbound connections"`
+	V2                          bool   `long:"v2" description:"DEPRECATED: Tor v2 onion services are obsolete and support will be removed in v0.21.0. Use v3 instead." hidden:"true"`
 	V3                          bool   `long:"v3" description:"Automatically set up a v3 onion service to listen for inbound connections"`
 	PrivateKeyPath              string `long:"privatekeypath" description:"The path to the private key of the onion service being created"`
 	EncryptKey                  bool   `long:"encryptkey" description:"Encrypts the Tor private key file on disk"`