diff --git a/src/lib/readable-stream/byte-stream-controller.ts b/src/lib/readable-stream/byte-stream-controller.ts
index a5a9ee6..44d96ae 100644
--- a/src/lib/readable-stream/byte-stream-controller.ts
+++ b/src/lib/readable-stream/byte-stream-controller.ts
@@ -932,9 +932,9 @@ export function ReadableByteStreamControllerRespondWithNewView(controller: Reada
     throw new RangeError('The region specified by view is larger than byobRequest');
   }
 
+  const viewByteLength = view.byteLength;
   firstDescriptor.buffer = TransferArrayBuffer(view.buffer);
-
-  ReadableByteStreamControllerRespondInternal(controller, view.byteLength);
+  ReadableByteStreamControllerRespondInternal(controller, viewByteLength);
 }
 
 export function SetUpReadableByteStreamController(stream: ReadableByteStream,