diff --git a/lib/index.js b/lib/index.js
index e4ced27..f30090a 100644
--- a/lib/index.js
+++ b/lib/index.js
@@ -130,7 +130,6 @@ module.exports = function(options) {
   return function(Bookshelf) {
     var modelProto  = Bookshelf.Model.prototype;
     var toJSON = modelProto.toJSON;
-    var serialize = modelProto.serialize;
     var related = modelProto.related;
     var fetchAll = modelProto.fetchAll;