diff --git a/pkgs/async/CHANGELOG.md b/pkgs/async/CHANGELOG.md
index a1e96832..82b7877d 100644
--- a/pkgs/async/CHANGELOG.md
+++ b/pkgs/async/CHANGELOG.md
@@ -1,3 +1,7 @@
+## 2.0.1
+
+* Fix a fuzzy arrow type warning.
+
 ## 2.0.0
 * Remove deprecated public `result.dart` and `stream_zip.dart` libraries and
   deprecated classes `ReleaseStreamTransformer` and `CaptureStreamTransformer`.
diff --git a/pkgs/async/lib/src/delegate/stream_subscription.dart b/pkgs/async/lib/src/delegate/stream_subscription.dart
index e7575d82..6bef924b 100644
--- a/pkgs/async/lib/src/delegate/stream_subscription.dart
+++ b/pkgs/async/lib/src/delegate/stream_subscription.dart
@@ -10,7 +10,7 @@ import '../typed/stream_subscription.dart';
 ///
 /// Subclasses can override individual methods.
 class DelegatingStreamSubscription<T> implements StreamSubscription<T> {
-  final StreamSubscription _source;
+  final StreamSubscription<T> _source;
 
   /// Create delegating subscription forwarding calls to [sourceSubscription].
   DelegatingStreamSubscription(StreamSubscription<T> sourceSubscription)
diff --git a/pkgs/async/pubspec.yaml b/pkgs/async/pubspec.yaml
index bb41d4f9..b5173cfe 100644
--- a/pkgs/async/pubspec.yaml
+++ b/pkgs/async/pubspec.yaml
@@ -1,5 +1,5 @@
 name: async
-version: 2.0.0
+version: 2.0.1
 author: Dart Team <misc@dartlang.org>
 description: Utility functions and classes related to the 'dart:async' library.
 homepage: https://www.github.com/dart-lang/async