diff --git a/lib/expmt/stealth.js b/lib/expmt/stealth.js
index c5fdaea3e..9fb48e100 100644
--- a/lib/expmt/stealth.js
+++ b/lib/expmt/stealth.js
@@ -6,12 +6,17 @@ var Hash = require('../hash');
 var KDF = require('../kdf');
 var base58check = require('../base58check');
 
-var Stealth = function Stealth(payloadKey, scanKey) {
+var Stealth = function Stealth(obj) {
   if (!(this instanceof Stealth))
-    return new Stealth(payloadKey, scanKey);
+    return new Stealth(obj);
+  if (obj)
+    this.set(obj);
+};
 
-  this.payloadKey = payloadKey;
-  this.scanKey = scanKey;
+Stealth.prototype.set = function(obj) {
+  this.payloadKey = obj.payloadKey || this.payloadKey;
+  this.scanKey = obj.scanKey || this.scanKey;
+  return this;
 };
 
 Stealth.prototype.fromAddressBuffer = function(buf) {
diff --git a/test/test.stealth.js b/test/test.stealth.js
index 6bacacdeb..138b16be9 100644
--- a/test/test.stealth.js
+++ b/test/test.stealth.js
@@ -36,6 +36,14 @@ describe('Stealth', function() {
     should.exist(stealth);
   });
 
+  describe('#set', function() {
+
+    it('should set payload key', function() {
+      should.exist(Stealth().set({payloadKey: stealth.payloadKey}).payloadKey);
+    });
+
+  });
+
   describe('#fromAddressBuffer', function() {
 
     it('should give a stealth address with the right pubkeys', function() {