1 files changed, 3 insertions, 1 deletions

diff --git a/src/WixToolset.Core/ResolveContext.cs b/src/WixToolset.Core/ResolveContext.cs
index 34da34d1..6e1718b6 100644
--- a/src/WixToolset.Core/ResolveContext.cs
+++ b/src/WixToolset.Core/ResolveContext.cs
@@ -2,8 +2,8 @@
 
 namespace WixToolset.Core
 {
-    using System;
     using System.Collections.Generic;
+    using System.Threading;
     using WixToolset.Data;
     using WixToolset.Extensibility;
     using WixToolset.Extensibility.Data;
@@ -35,5 +35,7 @@ namespace WixToolset.Core
         public IVariableResolver VariableResolver { get; set; }
 
         public bool AllowUnresolvedVariables { get; set; }
+
+        public CancellationToken CancellationToken { get; set; }
     }
 }