diff --git a/content-banners.js b/content-banners.js
index 8ae0d42..c0115d4 100644
--- a/content-banners.js
+++ b/content-banners.js
@@ -206,7 +206,7 @@ function displayRedirectBanner(newUrl, id, destinationName, destinationLanguage,
         document.body.insertAdjacentElement('beforeBegin', banner);
         // Increment banner count
         if (storage.breezewiki === 'on') {
-          if (currentURL.hostname.match(breezewikiRegex) || (storage.breezewikiHost === 'CUSTOM' && storage.breezewikiCustomHost.includes(currentURL.hostname))) {
+          if (currentURL.hostname.match(breezewikiRegex) || (storage.breezewikiHost === 'CUSTOM' && storage.breezewikiCustomHost?.includes(currentURL.hostname))) {
             chrome.storage.sync.set({ 'countAlerts': (storage.countAlerts ?? 0) + 1 });
           }
         } else {
@@ -233,7 +233,7 @@ function main() {
         if (currentURL.pathname.length > 1) {
           let origin = currentURL;
           // If on a BreezeWiki site, convert to Fandom link to match with our list of wikis:
-          if (currentURL.hostname.match(breezewikiRegex) || (storage.breezewikiHost === 'CUSTOM' && storage.breezewikiCustomHost.includes(currentURL.hostname))) {
+          if (currentURL.hostname.match(breezewikiRegex) || (storage.breezewikiHost === 'CUSTOM' && storage.breezewikiCustomHost?.includes(currentURL.hostname))) {
             origin = String(currentURL.pathname).split('/')[1] + '.fandom.com/wiki/';
             if (currentURL.search.includes('?q=')) {
               origin = origin + currentURL.search.substring(3).split('&')[0];