diff --git a/app/javascript/mastodon/features/status/index.jsx b/app/javascript/mastodon/features/status/index.jsx
index 0ed94d34c0ae861e1b94b3cbb882b1c052ea9ce5..195c6b5238e73c8435f6cac3af64640c48ea9fb2 100644
--- a/app/javascript/mastodon/features/status/index.jsx
+++ b/app/javascript/mastodon/features/status/index.jsx
@@ -166,8 +166,9 @@ const makeMapStateToProps = () => {
 };
 
 const truncate = (str, num) => {
-  if (str.length > num) {
-    return str.slice(0, num) + '…';
+  const arr = Array.from(str);
+  if (arr.length > num) {
+    return arr.slice(0, num).join('') + '…';
   } else {
     return str;
   }