diff --git a/CHANGELOG.md b/CHANGELOG.md
index f300a0c..d3b3410 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,3 +1,7 @@
+## 2.1.1
+
+ * Fixed a DDC compilation regression for consumers using the Dart 1.x SDK that was introduced in `2.1.0`.
+
 ## 2.1.0
 
  * Added an `IdentityCodec<T>` which implements `Codec<T,T>` for use as default
diff --git a/lib/src/identity_codec.dart b/lib/src/identity_codec.dart
index 1936481..3a2d028 100644
--- a/lib/src/identity_codec.dart
+++ b/lib/src/identity_codec.dart
@@ -1,7 +1,7 @@
 import 'dart:convert';
 
 class _IdentityConverter<T> extends Converter<T, T> {
-  const _IdentityConverter();
+  _IdentityConverter();
   T convert(T input) => input;
 }
 
@@ -17,8 +17,8 @@
 class IdentityCodec<T> extends Codec<T, T> {
   const IdentityCodec();
 
-  Converter<T, T> get decoder => _IdentityConverter<T>();
-  Converter<T, T> get encoder => _IdentityConverter<T>();
+  Converter<T, T> get decoder => new _IdentityConverter<T>();
+  Converter<T, T> get encoder => new _IdentityConverter<T>();
 
   /// Fuse with an other codec.
   ///
diff --git a/pubspec.yaml b/pubspec.yaml
index f3a4d67..e788c48 100644
--- a/pubspec.yaml
+++ b/pubspec.yaml
@@ -1,5 +1,5 @@
 name: convert
-version: 2.1.0
+version: 2.1.1
 description: Utilities for converting between data representations.
 author: Dart Team <misc@dartlang.org>
 homepage: https://github.com/dart-lang/convert