diff --git a/Jobs/ZUGFeRD/WorkerArgs.vb b/Jobs/ZUGFeRD/WorkerArgs.vb
index 226ad109..9367384a 100644
--- a/Jobs/ZUGFeRD/WorkerArgs.vb
+++ b/Jobs/ZUGFeRD/WorkerArgs.vb
@@ -3,7 +3,7 @@ Imports DigitalData.Modules.Interfaces
 
 Public Class WorkerArgs
     ' Directory Parameters
-    Public WatchDirectories As New List(Of String)
+    Public WatchDirectory As String = Nothing
     Public SuccessDirectory As String = Nothing
     Public ErrorDirectory As String = Nothing
     Public OriginalEmailDirectory As String = Nothing