diff --git a/ext/websocket/01_websocket.js b/ext/websocket/01_websocket.js
index d483608d8f..06eb08b60d 100644
--- a/ext/websocket/01_websocket.js
+++ b/ext/websocket/01_websocket.js
@@ -301,10 +301,7 @@ class WebSocket extends EventTarget {
     const sendTypedArray = (ta) => {
       this[_bufferedAmount] += ta.byteLength;
       PromisePrototypeThen(
-        core.opAsync("op_ws_send", this[_rid], {
-          kind: "binary",
-          value: ta,
-        }),
+        core.opAsync("op_ws_send_binary", this[_rid], ta),
         () => {
           this[_bufferedAmount] -= ta.byteLength;
         },
diff --git a/ext/websocket/lib.rs b/ext/websocket/lib.rs
index 8eac3e3506..8d3cb20d22 100644
--- a/ext/websocket/lib.rs
+++ b/ext/websocket/lib.rs
@@ -402,6 +402,20 @@ pub enum SendValue {
   Ping,
 }
 
+#[op]
+pub async fn op_ws_send_binary(
+  state: Rc<RefCell<OpState>>,
+  rid: ResourceId,
+  data: ZeroCopyBuf,
+) -> Result<(), AnyError> {
+  let resource = state
+    .borrow_mut()
+    .resource_table
+    .get::<WsStreamResource>(rid)?;
+  resource.send(Message::Binary(data.to_vec())).await?;
+  Ok(())
+}
+
 #[op]
 pub async fn op_ws_send_text(
   state: Rc<RefCell<OpState>>,
@@ -518,6 +532,7 @@ deno_core::extension!(deno_websocket,
     op_ws_send,
     op_ws_close,
     op_ws_next_event,
+    op_ws_send_binary,
     op_ws_send_text,
   ],
   esm = [ "01_websocket.js", "02_websocketstream.js" ],