1 files changed, 1 insertions, 1 deletions

diff --git a/src/WixToolset.Core.WindowsInstaller/Msi/MsiInterop.cs b/src/WixToolset.Core.WindowsInstaller/Msi/MsiInterop.cs
index 8d195033..ae585612 100644
--- a/src/WixToolset.Core.WindowsInstaller/Msi/MsiInterop.cs
+++ b/src/WixToolset.Core.WindowsInstaller/Msi/MsiInterop.cs
@@ -177,7 +177,7 @@ namespace WixToolset.Core.WindowsInstaller.Msi
     /// <summary>
     /// Class exposing static functions and structs from MSI API.
     /// </summary>
-    public sealed class MsiInterop
+    internal sealed class MsiInterop
     {
         // Patching constants
         public const int MsiMaxStreamNameLength = 62; // http://msdn2.microsoft.com/library/aa370551.aspx