diff --git a/lib/support/har/index.js b/lib/support/har/index.js
index 9cfdc1d6f..cd1cba97a 100644
--- a/lib/support/har/index.js
+++ b/lib/support/har/index.js
@@ -42,6 +42,7 @@ function getDocumentRequests(entries, pageId) {
 
   do {
     entry = pageEntries.shift();
+    if (!entry) break;
     requests.push(entry);
   } while (entry.response.redirectURL);
 
@@ -52,7 +53,7 @@ function getFinalURL(entries, pageref) {
   const requests = getDocumentRequests(entries, pageref);
 
   const finalEntry = requests.pop();
-  return finalEntry.request.url;
+  return finalEntry ? finalEntry.request.url : undefined;
 }
 
 function addExtrasToHAR(
@@ -249,13 +250,16 @@ export function getMainDocumentTimings(har) {
     for (let page of har.log.pages) {
       const pageId = page.id;
       const url = page._url;
+      if (url === undefined) continue;
 
       let pageEntries = [...entries];
       const finalURL = getFinalURL(pageEntries, pageId);
+      if (finalURL === undefined) continue;
 
       pageEntries = pageEntries.filter(
         entry => entry.pageref === pageId && entry.request.url === finalURL
       );
+      if (pageEntries.length === 0) continue;
 
       timings.push({ url, timings: pageEntries[0].timings });
     }