diff --git a/modules_dart/transform/lib/src/transform/common/annotation_matcher.dart b/modules_dart/transform/lib/src/transform/common/annotation_matcher.dart
index 3913c349d1..0da0b641aa 100644
--- a/modules_dart/transform/lib/src/transform/common/annotation_matcher.dart
+++ b/modules_dart/transform/lib/src/transform/common/annotation_matcher.dart
@@ -9,18 +9,20 @@ export 'class_matcher_base.dart' show ClassDescriptor;
 /// [ClassDescriptor]s for the default angular annotations that can appear
 /// on a class. These classes are re-exported in many places so this covers all
 /// the possible libraries which could provide them.
-const INJECTABLES = const [
+const _INJECTABLES = const [
   const ClassDescriptor(
       'Injectable', 'package:angular2/src/core/di/decorators.dart'),
   const ClassDescriptor('Injectable', 'package:angular2/core.dart'),
   const ClassDescriptor('Injectable', 'package:angular2/src/core/di.dart'),
   const ClassDescriptor('Injectable', 'package:angular2/angular2.dart'),
   const ClassDescriptor('Injectable', 'package:angular2/bootstrap_static.dart'),
-  const ClassDescriptor('Injectable', 'package:angular2/web_worker/worker.dart'),
+  const ClassDescriptor(
+      'Injectable', 'package:angular2/web_worker/worker.dart'),
 ];
 
-const DIRECTIVES = const [
-  const ClassDescriptor('Directive', 'package:angular2/src/core/metadatada/directive.dart',
+const _DIRECTIVES = const [
+  const ClassDescriptor(
+      'Directive', 'package:angular2/src/core/metadatada/directive.dart',
       superClass: 'Injectable'),
   const ClassDescriptor('Directive', 'package:angular2/src/core/metadata.dart',
       superClass: 'Injectable'),
@@ -32,8 +34,9 @@ const DIRECTIVES = const [
       superClass: 'Injectable'),
 ];
 
-const COMPONENTS = const [
-  const ClassDescriptor('Component', 'package:angular2/src/core/metadata/directive.dart',
+const _COMPONENTS = const [
+  const ClassDescriptor(
+      'Component', 'package:angular2/src/core/metadata/directive.dart',
       superClass: 'Directive'),
   const ClassDescriptor('Component', 'package:angular2/src/core/metadata.dart',
       superClass: 'Directive'),
@@ -45,7 +48,7 @@ const COMPONENTS = const [
       superClass: 'Directive'),
 ];
 
-const VIEWS = const [
+const _VIEWS = const [
   const ClassDescriptor('View', 'package:angular2/angular2.dart'),
   const ClassDescriptor('View', 'package:angular2/web_worker/worker.dart'),
   const ClassDescriptor('View', 'package:angular2/bootstrap_static.dart'),
@@ -61,10 +64,10 @@ class AnnotationMatcher extends ClassMatcherBase {
 
   factory AnnotationMatcher() {
     return new AnnotationMatcher._([]
-      ..addAll(COMPONENTS)
-      ..addAll(DIRECTIVES)
-      ..addAll(INJECTABLES)
-      ..addAll(VIEWS));
+      ..addAll(_COMPONENTS)
+      ..addAll(_DIRECTIVES)
+      ..addAll(_INJECTABLES)
+      ..addAll(_VIEWS));
   }
 
   bool _implementsWithWarning(Annotation annotation, AssetId assetId,
@@ -78,17 +81,17 @@ class AnnotationMatcher extends ClassMatcherBase {
 
   /// Checks if an [Annotation] node implements [Injectable].
   bool isInjectable(Annotation annotation, AssetId assetId) =>
-      _implementsWithWarning(annotation, assetId, INJECTABLES);
+      _implementsWithWarning(annotation, assetId, _INJECTABLES);
 
   /// Checks if an [Annotation] node implements [Directive].
   bool isDirective(Annotation annotation, AssetId assetId) =>
-      _implementsWithWarning(annotation, assetId, DIRECTIVES);
+      _implementsWithWarning(annotation, assetId, _DIRECTIVES);
 
   /// Checks if an [Annotation] node implements [Component].
   bool isComponent(Annotation annotation, AssetId assetId) =>
-      _implementsWithWarning(annotation, assetId, COMPONENTS);
+      _implementsWithWarning(annotation, assetId, _COMPONENTS);
 
   /// Checks if an [Annotation] node implements [View].
   bool isView(Annotation annotation, AssetId assetId) =>
-      _implementsWithWarning(annotation, assetId, VIEWS);
+      _implementsWithWarning(annotation, assetId, _VIEWS);
 }