1 files changed, 1 insertions, 0 deletions

diff --git a/src/WixToolset.Mba.Core/IBootstrapperApplication.cs b/src/WixToolset.Mba.Core/IBootstrapperApplication.cs
index 8e5d2aeb..c4daaf32 100644
--- a/src/WixToolset.Mba.Core/IBootstrapperApplication.cs
+++ b/src/WixToolset.Mba.Core/IBootstrapperApplication.cs
@@ -392,6 +392,7 @@ namespace WixToolset.Mba.Core
         int OnExecutePackageBegin(
             [MarshalAs(UnmanagedType.LPWStr)] string wzPackageId,
             [MarshalAs(UnmanagedType.Bool)] bool fExecute,
+            [MarshalAs(UnmanagedType.U4)] ActionState action,
             [MarshalAs(UnmanagedType.Bool)] ref bool fCancel
             );