diff --git a/features.txt b/features.txt
index cb393c1943864c75c8ddc44896c67bcad6763087..c86e276eda4943fcc13528af28510a7f294e76fb 100644
--- a/features.txt
+++ b/features.txt
@@ -123,6 +123,10 @@ Intl.RelativeTimeFormat
 # https://github.com/tc39/proposal-intl-segmenter
 Intl.Segmenter
 
+# Intl.NumberFormat unified proposal
+# https://github.com/sffc/proposal-unified-intl-numberformat
+Intl.NumberFormat-unified
+
 # Global
 # https://github.com/tc39/proposal-global
 globalThis