diff --git a/src/background/shared/tabs.js b/src/background/shared/tabs.js
index d09f676..8135d0e 100644
--- a/src/background/shared/tabs.js
+++ b/src/background/shared/tabs.js
@@ -87,7 +87,7 @@ const selectAt = (index) => {
 const selectByKeyword = (current, keyword) => {
   return browser.tabs.query({ currentWindow: true }).then((tabs) => {
     let matched = tabs.filter((t) => {
-      return t.url.includes(keyword) || t.title.includes(keyword);
+      return t.url.includes(keyword) || t.title && t.title.includes(keyword);
     });
 
     if (matched.length === 0) {