diff --git a/crypto/keyring/keyring.go b/crypto/keyring/keyring.go
index 8d5c707f1a9c..58daefb15296 100644
--- a/crypto/keyring/keyring.go
+++ b/crypto/keyring/keyring.go
@@ -586,7 +586,7 @@ func SignWithLedger(k *Record, msg []byte) (sig []byte, pub types.PubKey, err er
 		return
 	}
 
-	sig, err = priv.Sign(msg)
+	sig, err = priv.SignLedgerAminoJSON(msg)
 	if err != nil {
 		return nil, nil, err
 	}
diff --git a/crypto/ledger/ledger_mock.go b/crypto/ledger/ledger_mock.go
index 21e18cc6c99a..60d6471cef0b 100644
--- a/crypto/ledger/ledger_mock.go
+++ b/crypto/ledger/ledger_mock.go
@@ -84,7 +84,7 @@ func (mock LedgerSECP256K1Mock) GetAddressPubKeySECP256K1(derivationPath []uint3
 	return pk, addr, err
 }
 
-func (mock LedgerSECP256K1Mock) SignSECP256K1(derivationPath []uint32, message []byte) ([]byte, error) {
+func (mock LedgerSECP256K1Mock) SignSECP256K1(derivationPath []uint32, message []byte, p2 byte) ([]byte, error) {
 	path := hd.NewParams(derivationPath[0], derivationPath[1], derivationPath[2], derivationPath[3] != 0, derivationPath[4])
 	seed, err := bip39.NewSeedWithErrorChecking(testdata.TestMnemonic, "")
 	if err != nil {
diff --git a/crypto/ledger/ledger_secp256k1.go b/crypto/ledger/ledger_secp256k1.go
index 29f50ad4e212..fac4e1716605 100644
--- a/crypto/ledger/ledger_secp256k1.go
+++ b/crypto/ledger/ledger_secp256k1.go
@@ -32,7 +32,10 @@ type (
 		// Returns a compressed pubkey and bech32 address (requires user confirmation)
 		GetAddressPubKeySECP256K1([]uint32, string) ([]byte, string, error)
 		// Signs a message (requires user confirmation)
-		SignSECP256K1([]uint32, []byte) ([]byte, error)
+		// The last byte denotes the SIGN_MODE to be used by Ledger: 0 for
+		// LEGACY_AMINO_JSON, 1 for TEXTUAL. It corresponds to the P2 value
+		// in https://github.com/cosmos/ledger-cosmos/blob/main/docs/APDUSPEC.md
+		SignSECP256K1([]uint32, []byte, byte) ([]byte, error)
 	}
 
 	// PrivKeyLedgerSecp256k1 implements PrivKey, calling the ledger nano we
@@ -51,7 +54,7 @@ type (
 // This function is marked as unsafe as it will retrieve a pubkey without user verification.
 // It can only be used to verify a pubkey but never to create new accounts/keys. In that case,
 // please refer to NewPrivKeySecp256k1
-func NewPrivKeySecp256k1Unsafe(path hd.BIP44Params) (types.LedgerPrivKey, error) {
+func NewPrivKeySecp256k1Unsafe(path hd.BIP44Params) (types.LedgerPrivKeyAminoJSON, error) {
 	device, err := getDevice()
 	if err != nil {
 		return nil, err
@@ -88,7 +91,8 @@ func (pkl PrivKeyLedgerSecp256k1) PubKey() types.PubKey {
 	return pkl.CachedPubKey
 }
 
-// Sign returns a secp256k1 signature for the corresponding message
+// Sign returns a secp256k1 signature for the corresponding message using
+// SIGN_MODE_TEXTUAL.
 func (pkl PrivKeyLedgerSecp256k1) Sign(message []byte) ([]byte, error) {
 	device, err := getDevice()
 	if err != nil {
@@ -96,7 +100,19 @@ func (pkl PrivKeyLedgerSecp256k1) Sign(message []byte) ([]byte, error) {
 	}
 	defer warnIfErrors(device.Close)
 
-	return sign(device, pkl, message)
+	return sign(device, pkl, message, 1)
+}
+
+// SignLedgerAminoJSON returns a secp256k1 signature for the corresponding message using
+// SIGN_MODE_LEGACY_AMINO_JSON.
+func (pkl PrivKeyLedgerSecp256k1) SignLedgerAminoJSON(message []byte) ([]byte, error) {
+	device, err := getDevice()
+	if err != nil {
+		return nil, err
+	}
+	defer warnIfErrors(device.Close)
+
+	return sign(device, pkl, message, 0)
 }
 
 // ShowAddress triggers a ledger device to show the corresponding address.
@@ -228,13 +244,15 @@ func validateKey(device SECP256K1, pkl PrivKeyLedgerSecp256k1) error {
 // Communication is checked on NewPrivKeyLedger and PrivKeyFromBytes, returning
 // an error, so this should only trigger if the private key is held in memory
 // for a while before use.
-func sign(device SECP256K1, pkl PrivKeyLedgerSecp256k1, msg []byte) ([]byte, error) {
+//
+// Last byte P2 is 0 for LEGACY_AMINO_JSON, and 1 for TEXTUAL.
+func sign(device SECP256K1, pkl PrivKeyLedgerSecp256k1, msg []byte, p2 byte) ([]byte, error) {
 	err := validateKey(device, pkl)
 	if err != nil {
 		return nil, err
 	}
 
-	sig, err := device.SignSECP256K1(pkl.Path.DerivationPath(), msg)
+	sig, err := device.SignSECP256K1(pkl.Path.DerivationPath(), msg, p2)
 	if err != nil {
 		return nil, err
 	}
diff --git a/crypto/types/types.go b/crypto/types/types.go
index eccdba73813d..296900776563 100644
--- a/crypto/types/types.go
+++ b/crypto/types/types.go
@@ -29,6 +29,17 @@ type LedgerPrivKey interface {
 	Type() string
 }
 
+// LedgerPrivKeyAminoJSON is a Ledger PrivKey type that supports signing with
+// SIGN_MODE_LEGACY_AMINO_JSON. It is added as a non-breaking change, instead of directly
+// on the LedgerPrivKey interface (whose Sign method will sign with TEXTUAL),
+// and will be deprecated/removed once LEGACY_AMINO_JSON is removed.
+type LedgerPrivKeyAminoJSON interface {
+	LedgerPrivKey
+	// SignLedgerAminoJSON signs a messages on the Ledger device using
+	// SIGN_MODE_LEGACY_AMINO_JSON.
+	SignLedgerAminoJSON(msg []byte) ([]byte, error)
+}
+
 // PrivKey defines a private key and extends proto.Message. For now, it extends
 // LedgerPrivKey (see godoc for LedgerPrivKey). Ultimately, we should remove
 // LedgerPrivKey and add its methods here directly.