diff --git a/features.txt b/features.txt
index 0db12e018f2c3cfb420e0297b6d48f6c85ce38a8..b5ae0bd0acafa36f2ee10bd9fff6941e81b57277 100644
--- a/features.txt
+++ b/features.txt
@@ -51,6 +51,7 @@ regexp-unicode-property-escapes
 
 # Shared Memory and atomics
 # https://github.com/tc39/ecmascript_sharedmem
+Atomics
 SharedArrayBuffer
 
 # Standard language features
@@ -80,6 +81,7 @@ DataView.prototype.setUint8
 default-arg
 default-parameters
 destructuring-binding
+for-of
 Float64Array
 generators
 Int8Array