diff --git a/Service/Plugins/AccountingService.cs b/Service/Plugins/AccountingService.cs
index 724c3d28a..05fc017a9 100644
--- a/Service/Plugins/AccountingService.cs
+++ b/Service/Plugins/AccountingService.cs
@@ -158,7 +158,7 @@ namespace BeWo.Service.Plugins
 					}
 					else // Sammelrechnung
                     {
-						if (i2.RecipientCostBearerOid == invoices[0].InvoiceBase.RecipientCostBearerOid)
+						if (i2.SupportConceptOid == invoices[0].InvoiceBase.SupportConceptOid)
 						{
 							var siAlt = DAOFactory.SearchDAO.GetServiceInvoiceByInvoiceBaseOid(i2.Oid.Value);
 							var siDCAlt = MapperFactory.ServiceInvoiceDC_ServiceInvoice.MapToNewDC(siAlt);