1 files changed, 3 insertions, 1 deletions

diff --git a/src/WixToolset.Extensibility/Data/ILibraryContext.cs b/src/WixToolset.Extensibility/Data/ILibraryContext.cs
index 0371137b..12a400cd 100644
--- a/src/WixToolset.Extensibility/Data/ILibraryContext.cs
+++ b/src/WixToolset.Extensibility/Data/ILibraryContext.cs
@@ -2,8 +2,8 @@
 
 namespace WixToolset.Extensibility.Data
 {
-    using System;
     using System.Collections.Generic;
+    using System.Threading;
     using WixToolset.Data;
     using WixToolset.Extensibility.Services;
 
@@ -22,5 +22,7 @@ namespace WixToolset.Extensibility.Data
         IEnumerable<Localization> Localizations { get; set; }
 
         IEnumerable<Intermediate> Intermediates { get; set; }
+
+        CancellationToken CancellationToken { get; set; }
     }
 }