diff --git a/framework/src/Volo.Abp.Ddd.Domain/Volo/Abp/Domain/Entities/Events/Distributed/EntityEto.cs b/framework/src/Volo.Abp.Ddd.Domain/Volo/Abp/Domain/Entities/Events/Distributed/EntityEto.cs
index 6e30e9afab..8a2983b076 100644
--- a/framework/src/Volo.Abp.Ddd.Domain/Volo/Abp/Domain/Entities/Events/Distributed/EntityEto.cs
+++ b/framework/src/Volo.Abp.Ddd.Domain/Volo/Abp/Domain/Entities/Events/Distributed/EntityEto.cs
@@ -21,7 +21,7 @@ public class EntityEto : EtoBase
     }
 }
 
-public class EntityEto<TKey> : IEntityEto<TKey>
+public abstract class EntityEto<TKey> : IEntityEto<TKey>
 {
     public TKey Id { get; set; }
 }
\ No newline at end of file