1 files changed, 2 insertions, 1 deletions

diff --git a/src/WixToolset.Mba.Core/IBootstrapperEngine.cs b/src/WixToolset.Mba.Core/IBootstrapperEngine.cs
index d070998e..85ca8693 100644
--- a/src/WixToolset.Mba.Core/IBootstrapperEngine.cs
+++ b/src/WixToolset.Mba.Core/IBootstrapperEngine.cs
@@ -106,7 +106,8 @@ namespace WixToolset.Mba.Core
 
         void SetVariableString(
             [MarshalAs(UnmanagedType.LPWStr)] string wzVariable,
-                                              IntPtr wzValue
+                                              IntPtr wzValue,
+            [MarshalAs(UnmanagedType.Bool)]   bool fFormatted
             );
 
         void SetVariableVersion(