bip39passphrase.diff

diff --git a/lib/hd/hd.js b/lib/hd/hd.js
index d284171ef..0ca02ec3c 100644
--- a/lib/hd/hd.js
+++ b/lib/hd/hd.js
@@ -58,12 +58,12 @@ HD.fromSeed = function fromSeed(options) {
 /**
  * Instantiate an hd private key from a mnemonic.
  * @param {Mnemonic} mnemonic
- * @param {String?} passphrase
+ * @param {String?} bip39Passphrase
  * @returns {HDPrivateKey}
  */
 
-HD.fromMnemonic = function fromMnemonic(mnemonic, passphrase) {
-  return HDPrivateKey.fromMnemonic(mnemonic, passphrase);
+HD.fromMnemonic = function fromMnemonic(mnemonic, bip39Passphrase) {
+  return HDPrivateKey.fromMnemonic(mnemonic, bip39Passphrase);
 };
 
 /**
diff --git a/lib/wallet/http.js b/lib/wallet/http.js
index 3d7e8ff0b..d6db20cd4 100644
--- a/lib/wallet/http.js
+++ b/lib/wallet/http.js
@@ -299,7 +299,7 @@ class HTTP extends Server {
         m: valid.u32('m'),
         n: valid.u32('n'),
         passphrase: valid.str('passphrase'),
-        'bip39-passphrase': valid.str('bip39-passphrase'),
+        bip39Passphrase: valid.str('bip39Passphrase'),
         master: master,
         mnemonic: mnemonic,
         accountKey: accountKey,
diff --git a/lib/wallet/wallet.js b/lib/wallet/wallet.js
index 381a42d44..04d97a482 100644
--- a/lib/wallet/wallet.js
+++ b/lib/wallet/wallet.js
@@ -108,7 +108,7 @@ class Wallet extends EventEmitter {
         'Must create wallet with hd private key.');
     } else {
       mnemonic = new Mnemonic(options.mnemonic);
-      key = HD.fromMnemonic(mnemonic, options['bip39-passphrase']);
+      key = HD.fromMnemonic(mnemonic, options.bip39Passphrase);
     }
 
     this.master.fromKey(key, mnemonic);
diff --git a/test/wallet-test.js b/test/wallet-test.js
index e6ddc3044..1bf860ddf 100644
--- a/test/wallet-test.js
+++ b/test/wallet-test.js
@@ -1357,7 +1357,7 @@ describe('Wallet', function() {
     assert.bufferEqual(key.getHash(), addr.getHash());
   });
 
-  it('should yield different keys when bip39-passphrase is supplied', async () => {
+  it('should yield different keys when bip39Passphrase is supplied', async () => {
     const wallet = await wdb.create({
       mnemonic: {bits: 256}
     });
@@ -1368,7 +1368,7 @@ describe('Wallet', function() {
 
     const wallet3 = await wdb.create({
       mnemonic: wallet.master.mnemonic.toString(),
-      'bip39-passphrase': 'test'
+      bip39Passphrase: 'test'
     });
 
     assert.equal(wallet.master.key.xprivkey(), wallet2.master.key.xprivkey());