diff --git a/index.js b/index.js
index a17361e940..1b07292888 100644
--- a/index.js
+++ b/index.js
@@ -9,6 +9,7 @@ const connect = require('./lib/mongo_client').connect;
 
 // Expose error class
 connect.MongoError = core.MongoError;
+connect.MongoNetworkError = core.MongoNetworkError;
 
 // Actual driver classes exported
 connect.Admin = require('./lib/admin');