diff --git a/VectoCore/VectoCore/OutputData/XML/DeclarationReports/VehicleInformationFile/XMLMultistageBusReport.cs b/VectoCore/VectoCore/OutputData/XML/DeclarationReports/VehicleInformationFile/XMLMultistageBusReport.cs
index d22797a06140df9bbde9c18a7fc583a891cdf421..e0cdacc59dc5cee5478d20718a823168ea8f3dd0 100644
--- a/VectoCore/VectoCore/OutputData/XML/DeclarationReports/VehicleInformationFile/XMLMultistageBusReport.cs
+++ b/VectoCore/VectoCore/OutputData/XML/DeclarationReports/VehicleInformationFile/XMLMultistageBusReport.cs
@@ -178,6 +178,7 @@ namespace TUGraz.VectoCore.OutputData.XML.DeclarationReports.VehicleInformationF
 			retVal.Add(
 				new XElement(tns + XMLNames.VectoOutputMultistage,
 					_namespaceAttributes,
+					new XAttribute(XNamespace.Xmlns + "tns", tns),
 					_primaryVehicle,
 					_manufacturingStages,
 					GenerateInputManufacturingStage()