diff --git a/docs/en/Customizing-Application-Modules-Extending-Entities.md b/docs/en/Customizing-Application-Modules-Extending-Entities.md
index dcfe30c019..a7c3f4e7cd 100644
--- a/docs/en/Customizing-Application-Modules-Extending-Entities.md
+++ b/docs/en/Customizing-Application-Modules-Extending-Entities.md
@@ -50,7 +50,7 @@ ObjectExtensionManager.Instance
 * You provide the `IdentityUser` as the entity name, `string` as the type of the new property, `SocialSecurityNumber` as the property name (also, the field name in the database table).
 * You also need to provide an action that defines the database mapping properties using the [EF Core Fluent API](https://docs.microsoft.com/en-us/ef/core/modeling/entity-properties).
 
-> This code part must be executed before the related `DbContext` used. The [application startup template](Startup-Templates/Application.md) defines a static class named `YourProjectNameEntityExtensions`. You can define your extensions in this class to ensure that it is executed in the proper time. Otherwise, you should handle it yourself.
+> This code part must be executed before the related `DbContext` used. The [application startup template](Startup-Templates/Application.md) defines a static class named `YourProjectNameEfCoreEntityExtensionMappings`. You can define your extensions in this class to ensure that it is executed in the proper time. Otherwise, you should handle it yourself.
 
 Once you define an entity extension, you then need to use the standard [Add-Migration](https://docs.microsoft.com/en-us/ef/core/miscellaneous/cli/powershell#add-migration) and [Update-Database](https://docs.microsoft.com/en-us/ef/core/miscellaneous/cli/powershell#update-database) commands of the EF Core to create a code first migration class and update your database.
 
@@ -174,4 +174,4 @@ public class MyDistributedIdentityUserCreatedEventHandler :
 ## See Also
 
 * [Migration System for the EF Core](Entity-Framework-Core-Migrations.md)
-* [Customizing the Existing Modules](Customizing-Application-Modules-Guide.md)
\ No newline at end of file
+* [Customizing the Existing Modules](Customizing-Application-Modules-Guide.md)