diff --git a/crates/js-sys/src/lib.rs b/crates/js-sys/src/lib.rs
index 3490fbee..4034a9c7 100644
--- a/crates/js-sys/src/lib.rs
+++ b/crates/js-sys/src/lib.rs
@@ -914,6 +914,7 @@ extern {
 // Int8Array
 #[wasm_bindgen]
 extern "C" {
+    #[wasm_bindgen(extends = Object)]
     #[derive(Clone, Debug)]
     pub type Int8Array;
 
diff --git a/crates/js-sys/tests/wasm/TypedArray.rs b/crates/js-sys/tests/wasm/TypedArray.rs
index 5387213e..151dad8a 100644
--- a/crates/js-sys/tests/wasm/TypedArray.rs
+++ b/crates/js-sys/tests/wasm/TypedArray.rs
@@ -9,6 +9,7 @@ macro_rules! each {
         $m!(Uint8ClampedArray);
         $m!(Uint16Array);
         $m!(Uint32Array);
+        $m!(Int8Array);
     )
 }