diff --git a/lib/transactions.js b/lib/transactions.js
index 76cc1e8..63f15b2 100644
--- a/lib/transactions.js
+++ b/lib/transactions.js
@@ -190,7 +190,7 @@ exports.CreateGeneration = function(rpcData, publicKey, extraNoncePlaceholder, r
     var txVersion = txMessages === true ? 2 : 1;
     var txLockTime = 0;
 
-    var txInPrevOutHash = 0;
+    var txInPrevOutHash = "";
     var txInPrevOutIndex = Math.pow(2, 32) - 1;
     var txInSequence = 0;