diff --git a/packages/core/src/storages/request_provider.ts b/packages/core/src/storages/request_provider.ts
index 79ded20ee086..46f37018c343 100644
--- a/packages/core/src/storages/request_provider.ts
+++ b/packages/core/src/storages/request_provider.ts
@@ -779,6 +779,8 @@ declare class BuiltRequestProvider extends RequestProvider {
     ): Promise<Request<T> | null>;
 
     protected override ensureHeadIsNonEmpty(): Promise<void>;
+
+    override isFinished(): Promise<boolean>;
 }
 
 interface RequestLruItem {