diff --git a/aspnetcore/data/ef-mvc/complex-data-model.md b/aspnetcore/data/ef-mvc/complex-data-model.md
index 6762a8d762..6aca9707a6 100644
--- a/aspnetcore/data/ef-mvc/complex-data-model.md
+++ b/aspnetcore/data/ef-mvc/complex-data-model.md
@@ -228,9 +228,9 @@ You could put a `[Required]` attribute on the Instructor navigation property to
 
 ![Course entity](complex-data-model/_static/course-entity.png)
 
-In *Models/Course.cs*, replace the code you added earlier with the following code:
+In *Models/Course.cs*, replace the code you added earlier with the following code. The changes are highlighted.
 
-[!code-csharp[Main](intro/samples/cu/Models/Course.cs?name=snippet_Final&highlight=2,3,10,16,23)]
+[!code-csharp[Main](intro/samples/cu/Models/Course.cs?name=snippet_Final&highlight=2,10,13,16,21,23)]
 
 The course entity has a foreign key property `DepartmentID` which points to the related Department entity and it has a `Department` navigation property.