diff --git a/sdk/lib/_internal/js_dev_runtime/patch/isolate_patch.dart b/sdk/lib/_internal/js_dev_runtime/patch/isolate_patch.dart
index f3b2d12..f6aa73bb 100644
--- a/sdk/lib/_internal/js_dev_runtime/patch/isolate_patch.dart
+++ b/sdk/lib/_internal/js_dev_runtime/patch/isolate_patch.dart
@@ -6,6 +6,7 @@
 
 import 'dart:_js_helper' show patch, NoReifyGeneric;
 import 'dart:async';
+import "dart:typed_data" show TypedData;
 
 @patch
 class Isolate {