diff --git a/lib/processor.js b/lib/processor.js
index <HASH>..<HASH> 100644
--- a/lib/processor.js
+++ b/lib/processor.js
@@ -501,7 +501,6 @@ Processor.prototype.express = function (options) {
     var that = this;
 
     options = _.isObject(options) ? options : {};
-    options.onNotFound = _.isFunction(options.onNotFound) ? options.onNotFound : null;
 
     return function (req, res, next) {
improve the case where router returns the notfound error