diff --git a/IRaCIS.Core.Application/Service/TrialSiteUser/DTO/UserTrialViewModel.cs b/IRaCIS.Core.Application/Service/TrialSiteUser/DTO/UserTrialViewModel.cs
index de2e5be1c..bf1ccade5 100644
--- a/IRaCIS.Core.Application/Service/TrialSiteUser/DTO/UserTrialViewModel.cs
+++ b/IRaCIS.Core.Application/Service/TrialSiteUser/DTO/UserTrialViewModel.cs
@@ -498,7 +498,7 @@ namespace IRaCIS.Application.Contracts
 
         public Guid? UserTypeId { get; set; }
 
-        public List<UserTypeEnum> UserTypeList { get; set; }
+        public List<UserTypeEnum> UserTypeList { get; set; } = new List<UserTypeEnum>();
 
         public string UserName { get; set; } = string.Empty;