diff --git a/lib/blockTemplate.js b/lib/blockTemplate.js
index 723e0cfa8..35861bc4d 100644
--- a/lib/blockTemplate.js
+++ b/lib/blockTemplate.js
@@ -94,7 +94,7 @@ var BlockTemplate = module.exports = function BlockTemplate(jobId, rpcData, pool
         header.write(nTime, position += 4, 4, 'hex');
         header.write(merkleRoot, position += 4, 32, 'hex');
         header.write(rpcData.previousblockhash, position += 32, 32, 'hex');
-        header.writeUInt32BE(rpcData.version, position + 32);
+        header.writeInt32BE(rpcData.version, position + 32);
         var header = util.reverseBuffer(header);
         return header;
     };