diff --git a/lib/bcoin/mtx.js b/lib/bcoin/mtx.js
index ad3df84c..b99ac201 100644
--- a/lib/bcoin/mtx.js
+++ b/lib/bcoin/mtx.js
@@ -773,25 +773,26 @@ MTX.prototype.sign = function sign(index, addr, type) {
  * tx.addOutput({ address: ..., value: new bn(100000) });
  * tx.addOutput({ address: ..., value: utils.satoshi('0.1') });
  * tx.addOutput(receivingWallet, utils.satoshi('0.1'));
- * @param {Wallet|Address|Object} obj - Wallet, Address, or options (see {@link Script.createOutputScript} for options).
+ * @param {Wallet|Address|Object} obj - Wallet, Address,
+ * or options (see {@link Script.createOutputScript} for options).
  * @param {BN?} value - Only needs to be present for non-options.
  */
 
-MTX.prototype.addOutput = function addOutput(obj, value) {
+MTX.prototype.addOutput = function addOutput(address, value) {
   var options, output;
 
   assert(this.ts === 0, 'Cannot modify a confirmed tx.');
 
-  if ((obj instanceof bcoin.wallet) || (obj instanceof bcoin.address))
-    obj = obj.getAddress();
+  if ((address instanceof bcoin.wallet) || (address instanceof bcoin.address))
+    address = address.getAddress();
 
-  if (typeof obj === 'string') {
+  if (typeof address === 'string') {
     options = {
-      address: obj,
+      address: address,
       value: value
     };
   } else {
-    options = obj;
+    options = address;
   }
 
   output = bcoin.output(options, true);
diff --git a/lib/bcoin/workers.js b/lib/bcoin/workers.js
index 33256c46..245a3d7c 100644
--- a/lib/bcoin/workers.js
+++ b/lib/bcoin/workers.js
@@ -38,7 +38,7 @@ function Workers(options) {
 
   this.uid = 0;
   this.size = options.size || Workers.CORES;
-  this.timeout = options.timeout || -1;
+  this.timeout = options.timeout || 60000;
   this.children = [];
 }
 
@@ -184,7 +184,7 @@ Workers.prototype.execute = function execute(method, args, timeout, callback) {
  */
 
 Workers.prototype.verify = function verify(tx, index, force, flags, callback) {
-  return this.execute('verify', [tx, index, force, flags], null, callback);
+  return this.execute('verify', [tx, index, force, flags], -1, callback);
 };
 
 /**
diff --git a/lib/bcoin/writer.js b/lib/bcoin/writer.js
index ae764074..22284658 100644
--- a/lib/bcoin/writer.js
+++ b/lib/bcoin/writer.js
@@ -339,9 +339,13 @@ BufferWriter.prototype.writeChecksum = function writeChecksum() {
  */
 
 BufferWriter.prototype.fill = function fill(value, size) {
+  var buf;
+
   assert(size >= 0);
-  var buf = new Buffer(size);
+
+  buf = new Buffer(size);
   buf.fill(value);
+
   this.written += buf.length;
   this.data.push(['bytes', buf]);
 };