4 files changed, 15 insertions, 0 deletions

diff --git a/src/WixToolset.Core.Burn/BackendFactory.cs b/src/WixToolset.Core.Burn/BackendFactory.cs
index 042fa254..a69c47b5 100644
--- a/src/WixToolset.Core.Burn/BackendFactory.cs
+++ b/src/WixToolset.Core.Burn/BackendFactory.cs
@@ -5,6 +5,7 @@ namespace WixToolset.Core.Burn
     using System;
     using System.IO;
     using WixToolset.Extensibility;
+    using WixToolset.Extensibility.Services;
 
     internal class BackendFactory : IBackendFactory
     {
diff --git a/src/WixToolset.Core.Burn/Bind/BindBundleCommand.cs b/src/WixToolset.Core.Burn/Bind/BindBundleCommand.cs
index 212b1e81..3934491b 100644
--- a/src/WixToolset.Core.Burn/Bind/BindBundleCommand.cs
+++ b/src/WixToolset.Core.Burn/Bind/BindBundleCommand.cs
@@ -16,6 +16,7 @@ namespace WixToolset.Core.Burn
     using WixToolset.Data.Bind;
     using WixToolset.Data.Rows;
     using WixToolset.Extensibility;
+    using WixToolset.Extensibility.Services;
 
     // TODO: (4.0) Refactor so that these don't need to be copied.
     // Copied verbatim from ext\UtilExtension\wixext\UtilCompiler.cs
diff --git a/src/WixToolset.Core.Burn/BundleBackend.cs b/src/WixToolset.Core.Burn/BundleBackend.cs
index ef4d362c..0c7f2e8b 100644
--- a/src/WixToolset.Core.Burn/BundleBackend.cs
+++ b/src/WixToolset.Core.Burn/BundleBackend.cs
@@ -9,6 +9,7 @@ namespace WixToolset.Core.Burn
     using WixToolset.Data;
     using WixToolset.Data.Bind;
     using WixToolset.Extensibility;
+    using WixToolset.Extensibility.Services;
 
     internal class BundleBackend : IBackend
     {
diff --git a/src/WixToolset.Core.Burn/StandardBackend.cs b/src/WixToolset.Core.Burn/StandardBackend.cs
new file mode 100644
index 00000000..2ab30776
--- /dev/null
+++ b/src/WixToolset.Core.Burn/StandardBackend.cs
@@ -0,0 +1,12 @@
+// Copyright (c) .NET Foundation and contributors. All rights reserved. Licensed under the Microsoft Reciprocal License. See LICENSE.TXT file in the project root for full license information.
+
+namespace WixToolset.Core.Burn
+{
+    /// <summary>
+    /// Denotes this assembly contains a backend that is considered
+    /// a standard part of the WiX Toolset.
+    /// </summary>
+    public static class StandardBackend
+    {
+    }
+}