diff --git a/src/core.ts b/src/core.ts
index 6e3b8584e..b7037bd50 100644
--- a/src/core.ts
+++ b/src/core.ts
@@ -725,7 +725,7 @@ export type RequestOptions<Req = unknown | Record<string, unknown> | Readable> =
   method?: HTTPMethod;
   path?: string;
   query?: Req | undefined;
-  body?: Req | undefined;
+  body?: Req | null | undefined;
   headers?: Headers | undefined;
 
   maxRetries?: number;