diff --git a/lib/bcoin/chaindb.js b/lib/bcoin/chaindb.js
index 15f934e8..4dc74f74 100644
--- a/lib/bcoin/chaindb.js
+++ b/lib/bcoin/chaindb.js
@@ -1734,6 +1734,7 @@ ChainDB.prototype.hasCoins = function hasCoins(hash, callback) {
  */
 
 ChainDB.prototype.pruneBlock = function pruneBlock(block, callback) {
+  var self = this;
   var futureHeight, key;
 
   if (this.options.spv)
@@ -1803,7 +1804,7 @@ ChainState.prototype.disconnect = function connect(block) {
 };
 
 ChainState.prototype.add = function add(coin) {
-  this.coin++
+  this.coin++;
   this.value += coin.value;
 };
 
diff --git a/lib/bcoin/locker.js b/lib/bcoin/locker.js
index bde2eff1..a632bf7b 100644
--- a/lib/bcoin/locker.js
+++ b/lib/bcoin/locker.js
@@ -75,7 +75,7 @@ Locker.prototype.hasPending = function hasPending(key) {
 Locker.prototype.lock = function lock(func, args, force) {
   var self = this;
   var callback = args[args.length - 1];
-  var obj, called, arg;
+  var obj, called;
 
   if (typeof callback !== 'function')
     throw new Error(func.name + ' requires a callback.');
diff --git a/lib/bcoin/txdb.js b/lib/bcoin/txdb.js
index db227009..dcfacd6c 100644
--- a/lib/bcoin/txdb.js
+++ b/lib/bcoin/txdb.js
@@ -1263,9 +1263,10 @@ TXDB.prototype.unconfirm = function unconfirm(hash, callback, force) {
 TXDB.prototype._unconfirm = function unconfirm(tx, info, callback) {
   var self = this;
   var hash = tx.hash('hex');
+  var height = tx.height;
   var i, account;
 
-  if (tx.height === -1)
+  if (height === -1)
     return callback(null, false, info);
 
   tx.height = -1;
diff --git a/lib/bcoin/walletdb.js b/lib/bcoin/walletdb.js
index f687cd80..a3fa61ea 100644
--- a/lib/bcoin/walletdb.js
+++ b/lib/bcoin/walletdb.js
@@ -640,7 +640,7 @@ WalletDB.prototype.auth = function auth(wid, token, callback) {
 
 WalletDB.prototype.create = function create(options, callback) {
   var self = this;
-  var wallet, unlock;
+  var wallet;
 
   if (typeof options === 'function') {
     callback = options;
@@ -801,11 +801,11 @@ WalletDB.prototype.getAccounts = function getAccounts(wid, callback) {
       return callback(err);
 
     // Get it out of hash table mode.
-    accounts = new Array(map.length);
+    accounts = [];
 
     for (i = 0; i < map.length; i++) {
       assert(map[i] != null);
-      accounts[i] = map[i];
+      accounts.push(map[i]);
     }
 
     callback(null, accounts);