diff --git a/lib/wallet.js b/lib/wallet.js
index 8145bba..1d65fb2 100644
--- a/lib/wallet.js
+++ b/lib/wallet.js
@@ -244,6 +244,7 @@ Wallet.prototype._scanChain = function (opts) {
       })
       txs.on('end', function () {
         self.scanning = false
+        if (!txs.last) return
         self.state.tip = {
           height: txs.last.height,
           header: txs.last.header
@@ -570,7 +571,7 @@ Wallet.prototype._loadRootKey = function (cb) {
     if (err && !err.notFound) return cb(err)
     if (err && err.notFound) {
       self.rootKey = new HDPrivateKey()
-      var serialized = self.rootKey.toBuffer()
+      var serialized = self.rootKey.xprivkey
       self.store.put('root', serialized, opts, function (err) { cb(err, self.rootKey) })
       return
     }