1 files changed, 2 insertions, 1 deletions
diff --git a/core/libdeno/libdeno.d.ts b/core/libdeno/libdeno.d.ts
index 1bc7367d9..8a26e49ca 100644
--- a/core/libdeno/libdeno.d.ts
+++ b/core/libdeno/libdeno.d.ts
@@ -13,13 +13,14 @@ interface EvalErrorInfo {
 }
 
 declare interface MessageCallback {
-  (msg: Uint8Array): void;
+  (opId: number, msg: Uint8Array): void;
 }
 
 declare interface DenoCore {
   recv(cb: MessageCallback): void;
 
   send(
+    opId: number,
     control: null | ArrayBufferView,
     data?: ArrayBufferView
   ): null | Uint8Array;