diff --git a/lib/HistoricSync.js b/lib/HistoricSync.js
index f29e77bc..43e46386 100644
--- a/lib/HistoricSync.js
+++ b/lib/HistoricSync.js
@@ -15,6 +15,8 @@ function spec() {
   var Sync = require('./Sync').class();
   var sockets = require('../app/controllers/socket.js');
   var BlockExtractor = require('./BlockExtractor.js').class();
+  var buffertools = require('buffertools');
+  
   //  var bitcoreUtil = require('bitcore/util/util');
 	//  var Deserialize = require('bitcore/Deserialize');
 
@@ -29,7 +31,8 @@ function spec() {
 
     var genesisHashReversed = new Buffer(32);
     this.network.genesisBlock.hash.copy(genesisHashReversed);
-    this.genesis = genesisHashReversed.reverse().toString('hex');
+    buffertools.reverse(genesisHashReversed);
+    this.genesis = genesisHashReversed.toString('hex');
 
     this.rpc = new RpcClient(config.bitcoind);
     this.shouldBroadcast = opts.shouldBroadcastSync;