diff --git a/lib/services/bitcoind.js b/lib/services/bitcoind.js
index 2cd98d46..0537e597 100644
--- a/lib/services/bitcoind.js
+++ b/lib/services/bitcoind.js
@@ -2171,7 +2171,7 @@ Bitcoin.prototype.getDetailedTransaction = function (txid, callback) {
       let transactionData = {};
       async.series(
         [
-          function (callback) {
+          function (callback1) {
             client.getRawTransaction(txid, 1, function (err, response) {
               if (err) {
                 return done(self._wrapRPCError(err));
@@ -2237,16 +2237,16 @@ Bitcoin.prototype.getDetailedTransaction = function (txid, callback) {
 
               transactionData.txid = txid;
               transactionData.tx = tx;
-              callback(null, tx);
+              callback1(null, tx);
             });
           },
-          function (callback) {
+          function (callback2) {
             var tx = transactionData.tx;
             var txid = transactionData.txid;
             var vins = tx.inputs;
             var functionsArray = [];
             for (let i = 0; i < vins.length; i++) {
-              functionsArray.push(function (callback) {
+              functionsArray.push(function (callback3) {
                 var prevTxId = vins[i].prevTxId || null;
                 var rewards = 0;
                 if (prevTxId) {
@@ -2265,14 +2265,14 @@ Bitcoin.prototype.getDetailedTransaction = function (txid, callback) {
                         satoshis: vins[i].satoshis,
                       };
                       rewards = getKomodoRewards(rewardData);
-                      callback(null, {
+                      callback3(null, {
                         rewards: rewards,
                         prevTxnLocktime: result.locktime,
                       });
                     }
                   );
                 } else {
-                  callback(null, {
+                  callback3(null, {
                     rewards: 0,
                     prevTxnLocktime: null,
                   });
@@ -2307,7 +2307,7 @@ Bitcoin.prototype.getDetailedTransaction = function (txid, callback) {
                 tx.inputSatoshis + tx.rewardClaimed * 1e8 - tx.outputSatoshis;
               transactionData.txid = txid;
               transactionData.tx = tx;
-              callback(null, tx);
+              callback2(null, tx);
             });
           },
         ],