diff --git a/Report/ReportObjects/RosterRO.cs b/Report/ReportObjects/RosterRO.cs
index f6da62b42..b1e09d8e6 100644
--- a/Report/ReportObjects/RosterRO.cs
+++ b/Report/ReportObjects/RosterRO.cs
@@ -225,12 +225,12 @@ namespace BeWo.Report.ReportObjects
                 {
                     if (c.ContractEndDate.HasValue)
                     {
-                        if (c.EntryDate.Value <= reportDate && c.ContractEndDate.Value >= reportDate)
+                        if (c.EntryDate.HasValue && c.EntryDate.Value <= reportDate && c.ContractEndDate.Value >= reportDate)
                             currentContract = c;
                     }
                     else
                     {
-                        if (c.EntryDate.Value <= reportDate)
+                        if (c.EntryDate.HasValue && c.EntryDate.Value <= reportDate)
                             currentContract = c;
                     }
                 }