diff --git a/features.txt b/features.txt
index 62201f2d473bc2c1fc1a558bc6dd412f349e575a..913f7015ba7c14e2919b15fa5b227a4e037d7852 100644
--- a/features.txt
+++ b/features.txt
@@ -11,6 +11,10 @@
 # https://github.com/tc39/proposal-bigint
 BigInt
 
+# Class Fields
+# https://github.com/tc39/proposal-class-fields
+class-fields
+
 # Promise.prototype.finally
 # https://github.com/tc39/proposal-promise-finally
 Promise.prototype.finally