diff --git a/src/xmlbuilder/json2xml.js b/src/xmlbuilder/json2xml.js
index 6c3a95dd..5707ee0f 100644
--- a/src/xmlbuilder/json2xml.js
+++ b/src/xmlbuilder/json2xml.js
@@ -79,7 +79,7 @@ Builder.prototype.j2x = function(jObj, level) {
   let attrStr = '';
   let val = '';
   for (let key in jObj) {
-    if(!jObj.hasOwnProperty(key)) continue;
+    if(!Object.prototype.hasOwnProperty.call(jObj, key)) continue;
     if (typeof jObj[key] === 'undefined') {
       // supress undefined node only if it is not an attribute
       if (this.isAttribute(key)) {