1 files changed, 1 insertions, 0 deletions

diff --git a/src/WixToolset.Core/CompilerCore.cs b/src/WixToolset.Core/CompilerCore.cs
index 651c80a3..c9165b52 100644
--- a/src/WixToolset.Core/CompilerCore.cs
+++ b/src/WixToolset.Core/CompilerCore.cs
@@ -14,6 +14,7 @@ namespace WixToolset.Core
     using System.Xml.Linq;
     using WixToolset.Data;
     using WixToolset.Extensibility;
+    using WixToolset.Extensibility.Data;
     using WixToolset.Extensibility.Services;
     using Wix = WixToolset.Data.Serialize;