diff --git a/lib/constants/charset_encodings.js b/lib/constants/charset_encodings.js
index 7e9860f8ce..bef8283ce3 100644
--- a/lib/constants/charset_encodings.js
+++ b/lib/constants/charset_encodings.js
@@ -313,4 +313,5 @@ module.exports = [
   'utf8',
   'utf8',
   'utf8',
+  'utf8',
 ];