diff --git a/lib/transactions.js b/lib/transactions.js
index f16b681..72320b9 100644
--- a/lib/transactions.js
+++ b/lib/transactions.js
@@ -25,7 +25,7 @@ TxController.prototype.transaction = function(req, res, next, txid) {
   var self = this;
 
   this.node.getTransactionWithBlockInfo(txid, function(err, transaction) {
-    if (err && err instanceof self.node.errors.Transaction.NotFound) {
+    if (err && err.code === -5) {
       return common.handleErrors(null, res);
     } else if(err) {
       return common.handleErrors(err, res);
@@ -193,7 +193,7 @@ TxController.prototype.rawTransaction = function(req, res, next, txid) {
   var self = this;
 
   this.node.getTransaction(txid, function(err, transaction) {
-    if (err && err instanceof self.node.errors.Transaction.NotFound) {
+    if (err && err.code === -5) {
       return common.handleErrors(null, res);
     } else if(err) {
       return common.handleErrors(err, res);