diff --git a/features/intl.yml b/features/intl.yml
index 66ad9c4786d..c89b4c9b701 100644
--- a/features/intl.yml
+++ b/features/intl.yml
@@ -78,6 +78,7 @@ compat_features:
   - javascript.builtins.Intl.NumberFormat.formatRangeToParts
   - javascript.builtins.Intl.NumberFormat.formatToParts
   - javascript.builtins.Intl.NumberFormat.resolvedOptions
+  - javascript.builtins.Intl.NumberFormat.supportedLocalesOf
   - javascript.builtins.Array.toLocaleString
   - javascript.builtins.Array.toLocaleString.locales_parameter
   - javascript.builtins.Array.toLocaleString.options_parameter
diff --git a/features/intl.yml.dist b/features/intl.yml.dist
index 379c0728b9b..055754dfacb 100644
--- a/features/intl.yml.dist
+++ b/features/intl.yml.dist
@@ -135,6 +135,7 @@ compat_features:
   - javascript.builtins.Intl.NumberFormat.NumberFormat.options_parameter.options_useGrouping_parameter
   - javascript.builtins.Intl.NumberFormat.format
   - javascript.builtins.Intl.NumberFormat.resolvedOptions
+  - javascript.builtins.Intl.NumberFormat.supportedLocalesOf
 
   # baseline: high
   # baseline_low_date: 2017-09-28