diff --git a/crates/js-sys/src/lib.rs b/crates/js-sys/src/lib.rs
index e402b6ab..e429d413 100644
--- a/crates/js-sys/src/lib.rs
+++ b/crates/js-sys/src/lib.rs
@@ -3546,7 +3546,7 @@ pub mod Intl {
         /// that enable plural sensitive formatting and plural language rules.
         ///
         /// https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/PluralRules
-        #[wasm_bindgen(js_namespace = Intl)]
+        #[wasm_bindgen(extends = Object, js_namespace = Intl)]
         #[derive(Clone, Debug)]
         pub type PluralRules;
 
diff --git a/crates/js-sys/tests/wasm/Intl.rs b/crates/js-sys/tests/wasm/Intl.rs
index 8abff50b..4fd43f5d 100644
--- a/crates/js-sys/tests/wasm/Intl.rs
+++ b/crates/js-sys/tests/wasm/Intl.rs
@@ -87,6 +87,10 @@ fn plural_rules() {
     assert!(r.resolved_options().is_instance_of::<Object>());
     assert_eq!(r.select(1_f64), "one");
 
-    let r = Intl::PluralRules::supported_locales_of(&locales, &opts);
-    assert!(r.is_instance_of::<Array>());
+    let a = Intl::PluralRules::supported_locales_of(&locales, &opts);
+    assert!(a.is_instance_of::<Array>());
+
+    assert!(r.is_instance_of::<Intl::PluralRules>());
+    assert!(r.is_instance_of::<Object>());
+    let _: &Object = r.as_ref();
 }