diff --git a/IRaCIS.Core.Application/Service/Reading/Dto/ReadingImageTaskViewModel.cs b/IRaCIS.Core.Application/Service/Reading/Dto/ReadingImageTaskViewModel.cs
index 3624155e2..6dee74bc9 100644
--- a/IRaCIS.Core.Application/Service/Reading/Dto/ReadingImageTaskViewModel.cs
+++ b/IRaCIS.Core.Application/Service/Reading/Dto/ReadingImageTaskViewModel.cs
@@ -1241,7 +1241,7 @@ namespace IRaCIS.Core.Application.Service.Reading.Dto
         /// </summary>
         public Guid TrialId { get; set; }
 
-        public string MeasureData { get; set; }
+        public string MeasureData { get; set; } = string.Empty;
 
         public Guid? SeriesId { get; set; }