diff --git a/lib/apn.js b/lib/apn.js
index 931ad6b0..a31461a8 100644
--- a/lib/apn.js
+++ b/lib/apn.js
@@ -60,7 +60,7 @@ var Connection = function (optionArgs) {
 		if (!self.openingSocket) {
 			process.nextTick(function () {
 				self.socket = tls.connect(options['port'], options['gateway'], socketOptions,
-					callback = function () {
+					function () {
 						if (!self.socket.authorized) {
 							throw self.socket.authorizationError;
 						}