diff --git a/BeWo/View/Detail/Accounting/GkvAbrechnungOverview.xaml.cs b/BeWo/View/Detail/Accounting/GkvAbrechnungOverview.xaml.cs
index a55ad7b4d..c3fd6ea87 100644
--- a/BeWo/View/Detail/Accounting/GkvAbrechnungOverview.xaml.cs
+++ b/BeWo/View/Detail/Accounting/GkvAbrechnungOverview.xaml.cs
@@ -75,8 +75,8 @@ namespace BeWo.View.Detail.Accounting
 				var filter = new GkvAbrechnungViewFilterDC();
 
 				filter.FilterTime = true;
-				filter.Start = _Viewmodel.DateTimeSpanFilter.StartDate;
-				filter.End = _Viewmodel.DateTimeSpanFilter.EndDate;
+				filter.Start = _Viewmodel.DateTimeSpanFilter?.StartDate;
+				filter.End = _Viewmodel.DateTimeSpanFilter?.EndDate;
 				filter.FilterForCreationDate = true;
 
 				ServiceFacade.DoGkvAccountingServiceAsync(