diff --git a/dom/streams/ReadableByteStreamController.cpp b/dom/streams/ReadableByteStreamController.cpp
index cffa45777fd..b5c9c9b2274 100644
--- a/dom/streams/ReadableByteStreamController.cpp
+++ b/dom/streams/ReadableByteStreamController.cpp
@@ -826,6 +826,10 @@ MOZ_CAN_RUN_SCRIPT void ReadableByteStreamControllerFillReadRequestFromQueue(
   // byte offset, entry’s byte length »).
   aRv.MightThrowJSException();
   JS::Rooted<JSObject*> buffer(aCx, entry->Buffer());
+  if (!JS_WrapObject(aCx, &buffer)) {
+    aRv.StealExceptionFromJSContext(aCx);
+    return;
+  }
   JS::Rooted<JSObject*> view(
       aCx, JS_NewUint8ArrayWithBuffer(aCx, buffer, entry->ByteOffset(),
                                       int64_t(entry->ByteLength())));