1 files changed, 2 insertions, 2 deletions
diff --git a/core/lib.deno_core.d.ts b/core/lib.deno_core.d.ts
index f78c6fec2..1efb92dc6 100644
--- a/core/lib.deno_core.d.ts
+++ b/core/lib.deno_core.d.ts
@@ -10,14 +10,14 @@ declare namespace Deno {
     /** Send a JSON op to Rust, and synchronously receive the result. */
     function jsonOpSync(
       opName: string,
-      args: any,
+      args?: any,
       ...zeroCopy: Uint8Array[]
     ): any;
 
     /** Send a JSON op to Rust, and asynchronously receive the result. */
     function jsonOpAsync(
       opName: string,
-      args: any,
+      args?: any,
       ...zeroCopy: Uint8Array[]
     ): Promise<any>;