diff --git a/lib/helpers.js b/lib/helpers.js
index 4e4cbc2..c60ff85 100644
--- a/lib/helpers.js
+++ b/lib/helpers.js
@@ -38,7 +38,7 @@ exports.prepareMetaData = function(meta) {
  */
 function cleanFieldNames(object) {
   for (var field in object) {
-    if (!object.hasOwnProperty(field)) {
+    if (!Object.prototype.hasOwnProperty.call(object, field)) {
       continue;
     }
     var value = object[field];