diff --git a/Jobs/ZUGFeRD/ImportZUGFeRDFiles.vb b/Jobs/ZUGFeRD/ImportZUGFeRDFiles.vb
index cf617ac3..85552ae1 100644
--- a/Jobs/ZUGFeRD/ImportZUGFeRDFiles.vb
+++ b/Jobs/ZUGFeRD/ImportZUGFeRDFiles.vb
@@ -439,7 +439,8 @@ Public Class ImportZUGFeRDFiles
                         If oMoveDirectory = DIRECTORY_DONT_MOVE Then
                             _logger.Info("Application Error occurred. Files for message Id {0} will not be moved.", oMessageId)
 
-                        ElseIf oArgs.AllowXRechnung And oIsSuccess And oEInvoiceFileGroup.Item(0).Extension = ".xml" Then
+                        ElseIf oArgs.AllowXRechnung And oIsSuccess And
+                            oEInvoiceFileGroup.Item(0).Extension.Equals(".xml", StringComparison.OrdinalIgnoreCase) = True Then
                             _logger.Debug("Before Creating the PDF-File from XML data / Before Commit")
 
                             oxRechnungHandle = True