diff --git a/lib/utils.js b/lib/utils.js
index eb3b698..dda5a1b 100644
--- a/lib/utils.js
+++ b/lib/utils.js
@@ -25,7 +25,7 @@ exports.instanceId = function () {
  * Validate miner address
  **/
 console.log(config.poolAddress)
-var addressBase58Prefix = parseInt(cnUtil.address_decode(new Buffer(config.poolAddress)).toString());
+var addressBase58Prefix = parseInt(cnUtil.address_decode(new Buffer(config.poolAddress))).toString();
 var integratedAddressBase58Prefix = config.poolServer.intAddressPrefix ? parseInt(config.poolServer.intAddressPrefix) : addressBase58Prefix + 1;
 var subAddressBase58Prefix = config.poolServer.subAddressPrefix ? parseInt(config.poolServer.subAddressPrefix) : "N/A";