diff --git a/lib/net/upnp.js b/lib/net/upnp.js
index 7a8293ca..85ec40de 100644
--- a/lib/net/upnp.js
+++ b/lib/net/upnp.js
@@ -333,6 +333,7 @@ function UPNPService(options) {
 
 UPNPService.prototype.createRequest = function createRequest(action, args) {
   const type = JSON.stringify(this.serviceType);
+
   let params = '';
 
   for (const [key, value] of args) {
@@ -605,14 +606,14 @@ XMLElement.prototype._collect = function _collect(name, result) {
  */
 
 XMLElement.prototype.find = function find(name) {
-  for (let child of this.children) {
+  for (const child of this.children) {
     if (child.type === name)
       return child;
 
-    child = child.find(name);
+    const desc = child.find(name);
 
-    if (child)
-      return child;
+    if (desc)
+      return desc;
   }
 
   return null;