diff --git a/IRaCIS.Core.Application/Service/Reading/_MapConfig.cs b/IRaCIS.Core.Application/Service/Reading/_MapConfig.cs
index cd66366f2..65e9e5268 100644
--- a/IRaCIS.Core.Application/Service/Reading/_MapConfig.cs
+++ b/IRaCIS.Core.Application/Service/Reading/_MapConfig.cs
@@ -13,6 +13,7 @@ namespace IRaCIS.Core.Application.Service
         {
             CreateMap<ReadingPeriodSetAddOrEdit, ReadingPeriodSet>();
 
+            CreateMap<AddOrUpdateTumorAssessmentInDto, TumorAssessment>();
 
             CreateMap<ReadingPeriodSet, ReadingPeriodSetView>()
                 .ForMember(d => d.SubjectVisitName, u => u.MapFrom(s => s.VisitStage==null?string.Empty: s.VisitStage.VisitName))