1 files changed, 1 insertions, 0 deletions

diff --git a/src/WixToolset.Core.WindowsInstaller/MspBackend.cs b/src/WixToolset.Core.WindowsInstaller/MspBackend.cs
index 4b13258b..ea16a570 100644
--- a/src/WixToolset.Core.WindowsInstaller/MspBackend.cs
+++ b/src/WixToolset.Core.WindowsInstaller/MspBackend.cs
@@ -10,6 +10,7 @@ namespace WixToolset.Core.WindowsInstaller
     using WixToolset.Data;
     using WixToolset.Data.Bind;
     using WixToolset.Extensibility;
+    using WixToolset.Extensibility.Services;
     using WixToolset.Msi;
     using WixToolset.Ole32;