1 files changed, 2 insertions, 1 deletions
diff --git a/xml.js b/xml.js
index 877fff7..88ffd6d 100644
--- a/xml.js
+++ b/xml.js
@@ -246,7 +246,8 @@ XML_Element.prototype.toString = function (isFormatted, indentationLevel) {
 
     // attributes, if any
     for (key in this.attributes) {
-        if (this.attributes.hasOwnProperty(key) && this.attributes[key]) {
+        if (Object.prototype.hasOwnProperty.call(this.attributes, key)
+                && this.attributes[key]) {
             result += ' ' + key + '="' + this.attributes[key] + '"';
         }
     }