diff --git a/lib/connection.js b/lib/connection.js
index 39469a309..799ab4ed8 100644
--- a/lib/connection.js
+++ b/lib/connection.js
@@ -94,7 +94,7 @@ Connection.prototype.connect = function (port, host) {
     self.stream = tls.connect({
       socket: self.stream,
       servername: host,
-      checkServerIdentity: self.ssl.checkServerIdentity,
+      checkServerIdentity: self.ssl.checkServerIdentity || tls.checkServerIdentity,
       rejectUnauthorized: self.ssl.rejectUnauthorized,
       ca: self.ssl.ca,
       pfx: self.ssl.pfx,