diff --git a/lib/services/bitcoind.js b/lib/services/bitcoind.js
index 1b99344a..6316573b 100644
--- a/lib/services/bitcoind.js
+++ b/lib/services/bitcoind.js
@@ -718,7 +718,6 @@ Bitcoin.prototype._subscribeZmqEvents = function(node) {
 };
 
 Bitcoin.prototype._initZmqSubSocket = function(node, zmqUrl) {
-  var self = this;
   node.zmqSubSocket = zmq.socket('sub');
 
   node.zmqSubSocket.on('connect', function(fd, endPoint) {
@@ -736,7 +735,7 @@ Bitcoin.prototype._initZmqSubSocket = function(node, zmqUrl) {
   node.zmqSubSocket.on('monitor_error', function(err) {
     log.error('Error in monitoring: %s, will restart monitoring in 5 seconds', err);
     setTimeout(function() {
-      self.zmqSubSocket.monitor(500, 0);
+      node.zmqSubSocket.monitor(500, 0);
     }, 5000);
   });