diff --git a/src/EditorFeatures/Core/Tagging/AsynchronousTaggerProvider.cs b/src/EditorFeatures/Core/Tagging/AsynchronousTaggerProvider.cs
index aedba1343de552c543e97ecbca5e2e81a5545e69..38c76ada447824b9319c967cc911ce7a31cb602b 100644
--- a/src/EditorFeatures/Core/Tagging/AsynchronousTaggerProvider.cs
+++ b/src/EditorFeatures/Core/Tagging/AsynchronousTaggerProvider.cs
@@ -16,8 +16,6 @@ internal abstract class AsynchronousTaggerProvider<TTag> :
     {
         private readonly ITaggerProvider _underlyingTagger;
 
-        public event EventHandler<SnapshotSpanEventArgs> TagsChanged;
-
         protected AsynchronousTaggerProvider(
             IAsynchronousOperationListener asyncListener,
             IForegroundNotificationService notificationService)
diff --git a/src/EditorFeatures/Core/Tagging/AsynchronousViewTaggerProvider.cs b/src/EditorFeatures/Core/Tagging/AsynchronousViewTaggerProvider.cs
index ea9e3b407a0454ba890e3614e3bb0f95ff739cfc..49522b664650519754f9314571de63f2265b1b6a 100644
--- a/src/EditorFeatures/Core/Tagging/AsynchronousViewTaggerProvider.cs
+++ b/src/EditorFeatures/Core/Tagging/AsynchronousViewTaggerProvider.cs
@@ -17,8 +17,6 @@ internal abstract class AsynchronousViewTaggerProvider<TTag> :
     {
         private readonly IViewTaggerProvider _underlyingTagger;
 
-        public event EventHandler<SnapshotSpanEventArgs> TagsChanged;
-
         protected AsynchronousViewTaggerProvider(
             IAsynchronousOperationListener asyncListener,
             IForegroundNotificationService notificationService)