diff --git a/src/Workspaces/Core/Portable/CodeActions/CodeAction.cs b/src/Workspaces/Core/Portable/CodeActions/CodeAction.cs
index 6605a5bd196d2e6726c36769c6d4dde2ffe1d079..d83155832a3899e12657a109544007abb45bb4f1 100644
--- a/src/Workspaces/Core/Portable/CodeActions/CodeAction.cs
+++ b/src/Workspaces/Core/Portable/CodeActions/CodeAction.cs
@@ -170,7 +170,7 @@ protected virtual Task<IEnumerable<CodeActionOperation>> ComputePreviewOperation
         /// </remarks>
         /// <exception cref="NotSupportedException">If this code action does not support changing a single document.</exception>
         protected virtual Task<Document> GetChangedDocumentAsync(CancellationToken cancellationToken)
-            => throw new NotSupportedException();
+            => throw new NotSupportedException(GetType().FullName);
 
         /// <summary>
         /// used by batch fixer engine to get new solution