diff --git a/hdwallet.go b/hdwallet.go
index c40dd4c..d7b8747 100644
--- a/hdwallet.go
+++ b/hdwallet.go
@@ -264,14 +264,6 @@ func (w *Wallet) SignTxWithPassphrase(account accounts.Account, passphrase strin
 	return w.SignTx(account, tx, chainID)
 }
 
-// Mnemonic returns the wallet's mnemonic, if using a mnemonic as a seed.
-func (w *Wallet) Mnemonic() (string, error) {
-	if w.mnemonic == "" {
-		return "", errors.New("this wallet is not using a mnemonic")
-	}
-	return w.mnemonic, nil
-}
-
 // PrivateKey returns the ECDSA private key of the account.
 func (w *Wallet) PrivateKey(account accounts.Account) (*ecdsa.PrivateKey, error) {
 	path, err := ParseDerivationPath(account.URL.Path)
diff --git a/hdwallet_test.go b/hdwallet_test.go
index 07e522c..b79d59b 100644
--- a/hdwallet_test.go
+++ b/hdwallet_test.go
@@ -20,15 +20,6 @@ func TestWallet(t *testing.T) {
 		t.Error(err)
 	}
 
-	walletmnemonic, err := wallet.Mnemonic()
-	if err != nil {
-		t.Error(err)
-	}
-
-	if walletmnemonic != mnemonic {
-		t.Error("wrong mnemonic")
-	}
-
 	path, err := ParseDerivationPath("m/44'/60'/0'/0/0")
 	if err != nil {
 		t.Error(err)