diff --git a/ReportImp/PerspektivenEV/Service/CustomStundenuebersichtAuswertung.cs b/ReportImp/PerspektivenEV/Service/CustomStundenuebersichtAuswertung.cs
index 7d4c84cea..dd5f5585f 100644
--- a/ReportImp/PerspektivenEV/Service/CustomStundenuebersichtAuswertung.cs
+++ b/ReportImp/PerspektivenEV/Service/CustomStundenuebersichtAuswertung.cs
@@ -64,7 +64,7 @@ namespace PerspektivenEV.Service
             }
         }
 
-        public override bool AllowCustomerAnalysis(Customer customer, FLSAnalysisConfigDC config, IList<ServiceRecord> serviceRecords)
+        public override bool AllowCustomerAnalysis(Customer customer, FLSAnalysisConfigDC config, IList<IServiceRecord> serviceRecords)
         {
             if (config.EmployeeOid != null)
             {