diff --git a/src/libs/index.js b/src/libs/index.js
index 5f0d5d0..b6aae6c 100644
--- a/src/libs/index.js
+++ b/src/libs/index.js
@@ -100,7 +100,7 @@ export const matchRule = async (
  */
 export const detectLang = async (q) => {
   try {
-    const res = await browser?.i18n.detectLanguage(q);
+    const res = await browser?.i18n?.detectLanguage(q);
     return res?.languages?.[0]?.language;
   } catch (err) {
     console.log("[detect lang]", err);