diff --git a/packages/core/src/Router.ts b/packages/core/src/Router.ts
index 24e6d8d6..e6f36165 100644
--- a/packages/core/src/Router.ts
+++ b/packages/core/src/Router.ts
@@ -166,7 +166,11 @@ export default class Router {
 
 					const requestBody = request?.body || options?.body;
 					if (requestBody instanceof ReadableStream) {
-						requestBody.cancel(error);
+						if (requestBody.locked) {
+							requestBody.getReader().cancel(error);
+						} else {
+							requestBody.cancel(error);
+						}
 					}
 
 					if (callLog?.response?.body) {