diff --git a/lib/bcoin/wallet.js b/lib/bcoin/wallet.js
index d5aded79..4fae1249 100644
--- a/lib/bcoin/wallet.js
+++ b/lib/bcoin/wallet.js
@@ -1395,6 +1395,7 @@ Wallet.prototype.scriptInputs = function scriptInputs(tx, callback) {
 
 Wallet.prototype.sign = function sign(tx, options, callback) {
   var self = this;
+  var passphrase, timeout, index, type;
 
   if (typeof options === 'function') {
     callback = options;
@@ -1404,15 +1405,20 @@ Wallet.prototype.sign = function sign(tx, options, callback) {
   if (typeof options === 'string' || Buffer.isBuffer(options))
     options = { passphrase: options };
 
+  passphrase = options.passphrase;
+  timeout = options.timeout;
+  index = options.index;
+  type = options.type;
+
   this.deriveInputs(tx, function(err, rings) {
     if (err)
       return callback(err);
 
-    self.unlock(options.passphrase, options.timeout, function(err, master) {
+    self.unlock(passphrase, timeout, function(err, master) {
       if (err)
         return callback(err);
 
-      self._sign(rings, master, tx, options.index, options.type, callback);
+      self._sign(rings, master, tx, index, type, callback);
     });
   });
 };