diff --git a/packages/strapi-bookshelf/lib/index.js b/packages/strapi-bookshelf/lib/index.js
index fcd2f30063..8882a72ddc 100755
--- a/packages/strapi-bookshelf/lib/index.js
+++ b/packages/strapi-bookshelf/lib/index.js
@@ -156,7 +156,7 @@ module.exports = function (strapi) {
             const done = _.after(_.size(definition.attributes), () => {
               try {
                 // Initialize lifecycle callbacks.
-                loadedModel.initialize = () => {
+                loadedModel.initialize = function () {
                   const self = this;
                   const lifecycle = {
                     creating: 'beforeCreate',