diff --git a/lib/HierarchicalKey.js b/lib/HierarchicalKey.js
index bc4e4d686..749529a99 100644
--- a/lib/HierarchicalKey.js
+++ b/lib/HierarchicalKey.js
@@ -150,8 +150,12 @@ HierarchicalKey.prototype.buildExtendedPublicKey = function() {
   r = r.put(this.chainCode);
   r = r.put(this.eckey.public);
 
-  this.extendedPublicKey = r.buffer();
+
+  require('chai').should;
   console.log('a');
+  //console.log(this.eckey.public.length);
+
+  this.extendedPublicKey = r.buffer();
 }
 
 HierarchicalKey.prototype.extendedPublicKeyString = function(format) {
diff --git a/test/test.HierarchicalKey.js b/test/test.HierarchicalKey.js
index 1c032aa85..1dbf8f619 100644
--- a/test/test.HierarchicalKey.js
+++ b/test/test.HierarchicalKey.js
@@ -316,7 +316,11 @@ describe('HierarchicalKey', function() {
       //hk.derive(sp).extendedPrivateKeyString().should.equal(
       //  'tprv8cSDV3fVD6wqGoLKykTPhRwWLiwD6WBHvYHYkFvp8PJvApm7HCfY9HH9P6Q6iPaCGNsU3LEqh7iJMN7478TqjkLFnf71f9zBXXd7XoiL7dw');
       //hk.derive(sp).extendedPrivateKeyString().should.equal(hk.derive(sp).extendedPrivateKeyString());
-      hk.derive(hp).extendedPrivateKeyString().should.equal(hk.derive(hp).extendedPrivateKeyString());
+      var epk1 = hk.derive(hp).extendedPrivateKeyString();
+      var epk2 = hk.derive(hp).extendedPrivateKeyString();
+      console.log(epk1);
+      console.log(epk2);
+      epk1.should.equal(epk2);
       //hk.derive(hp).extendedPrivateKeyString().should.equal(
       //  'tprv8cSDV3fdYmUoTNGu4xRTm6qh3DPrNxPZzukM5FPdWoa9m22ALFJVGbjnU7J4TC5t3MJp293GtZWssAPuV1PNWGjXavQTnXy9xW6Lee2X6rd');
     });