diff --git a/src/request.js b/src/request.js
index 6eac7ef..b8d5776 100644
--- a/src/request.js
+++ b/src/request.js
@@ -45,11 +45,12 @@ export default function request({method, host, path, qs, agent}) {
       });
 
       res.on('end', () => {
-        if (res.statusCode === 429 && res.headers['set-cookie']) {
+        if (res.statusCode === 429) {
           // Fix for the "too many requests" issue
           // Look for the set-cookie header and re-request
-          cookieVal = res.headers['set-cookie'][0].split(';')[0];
-          options.headers = {'cookie': cookieVal};
+          cookieVal = res.headers['set-cookie'] ?
+            res.headers['set-cookie'][0].split(';')[0] : '';
+          options.headers = cookieVal ? {'cookie': cookieVal} : {};
           rereq(options, function(err, response) {
             if (err) return reject(err);
             resolve(response);
diff --git a/src/utilities.js b/src/utilities.js
index 6f2152f..308d402 100644
--- a/src/utilities.js
+++ b/src/utilities.js
@@ -162,6 +162,10 @@ export function parseResults(results) {
  * @return {Array}     Returns an array of comparisonItems
  */
 export function formatComparisonItems(obj) {
+  // fix the querystring has the agent param from obj
+  obj = Object.assign({}, obj);
+  delete obj.agent;
+
   const isMultiRegion = obj.geo && Array.isArray(obj.geo);
   let isMultiKeyword = Array.isArray(obj.keyword);