diff --git a/features/font-variant-alternates.yml b/features/font-variant-alternates.yml
index da731e9d929..443bb8a5cab 100644
--- a/features/font-variant-alternates.yml
+++ b/features/font-variant-alternates.yml
@@ -33,3 +33,15 @@ compat_features:
   - api.CSSFontFeatureValuesRule.styleset
   - api.CSSFontFeatureValuesRule.stylistic
   - api.CSSFontFeatureValuesRule.swash
+  - api.CSSFontFeatureValuesMap
+  - api.CSSFontFeatureValuesMap.@@iterator
+  - api.CSSFontFeatureValuesMap.clear
+  - api.CSSFontFeatureValuesMap.delete
+  - api.CSSFontFeatureValuesMap.entries
+  - api.CSSFontFeatureValuesMap.forEach
+  - api.CSSFontFeatureValuesMap.get
+  - api.CSSFontFeatureValuesMap.has
+  - api.CSSFontFeatureValuesMap.keys
+  - api.CSSFontFeatureValuesMap.set
+  - api.CSSFontFeatureValuesMap.size
+  - api.CSSFontFeatureValuesMap.values
diff --git a/features/font-variant-alternates.yml.dist b/features/font-variant-alternates.yml.dist
index e07e0b4f70a..b4c1ccc6d77 100644
--- a/features/font-variant-alternates.yml.dist
+++ b/features/font-variant-alternates.yml.dist
@@ -71,6 +71,18 @@ compat_features:
   #   chrome: "111"
   #   chrome_android: "111"
   #   edge: "111"
+  - api.CSSFontFeatureValuesMap
+  - api.CSSFontFeatureValuesMap.@@iterator
+  - api.CSSFontFeatureValuesMap.clear
+  - api.CSSFontFeatureValuesMap.delete
+  - api.CSSFontFeatureValuesMap.entries
+  - api.CSSFontFeatureValuesMap.forEach
+  - api.CSSFontFeatureValuesMap.get
+  - api.CSSFontFeatureValuesMap.has
+  - api.CSSFontFeatureValuesMap.keys
+  - api.CSSFontFeatureValuesMap.set
+  - api.CSSFontFeatureValuesMap.size
+  - api.CSSFontFeatureValuesMap.values
   - api.CSSFontFeatureValuesRule.annotation
   - api.CSSFontFeatureValuesRule.characterVariant
   - api.CSSFontFeatureValuesRule.ornaments