diff --git a/Marco.Pms.Services/Controllers/ProjectController.cs b/Marco.Pms.Services/Controllers/ProjectController.cs
index fde715f..09858d5 100644
--- a/Marco.Pms.Services/Controllers/ProjectController.cs
+++ b/Marco.Pms.Services/Controllers/ProjectController.cs
@@ -894,7 +894,7 @@ namespace MarcoBMS.Services.Controllers
                     },
                     WorkCategoryMaster = new WorkCategoryMasterMongoDB
                     {
-                        Id = wi.ActivityId.ToString(),
+                        Id = wi.WorkCategoryId.ToString() ?? "",
                         Name = wi.WorkCategoryMaster != null ? wi.WorkCategoryMaster.Name : "",
                         Description = wi.WorkCategoryMaster != null ? wi.WorkCategoryMaster.Description : ""
                     },