diff --git a/packages/vite/client.d.ts b/packages/vite/client.d.ts
index b73389ec373f1f..0f2c3db286d82f 100644
--- a/packages/vite/client.d.ts
+++ b/packages/vite/client.d.ts
@@ -221,7 +221,7 @@ declare module '*.txt' {
 // wasm?init
 declare module '*.wasm?init' {
   const initWasm: (
-    options: WebAssembly.Imports,
+    options?: WebAssembly.Imports,
   ) => Promise<WebAssembly.Instance>
   export default initWasm
 }