diff --git a/framework/src/Volo.Abp.Ddd.Domain/Volo/Abp/Domain/Services/IDomainService.cs b/framework/src/Volo.Abp.Ddd.Domain/Volo/Abp/Domain/Services/IDomainService.cs
index 112243de44..5f57de7c9e 100644
--- a/framework/src/Volo.Abp.Ddd.Domain/Volo/Abp/Domain/Services/IDomainService.cs
+++ b/framework/src/Volo.Abp.Ddd.Domain/Volo/Abp/Domain/Services/IDomainService.cs
@@ -3,7 +3,7 @@ using Volo.Abp.DependencyInjection;
 namespace Volo.Abp.Domain.Services
 {
     /// <summary>
-    /// This interface must be implemented by all domain services to identify them by convention.
+    /// This interface can be implemented by all domain services to identify them by convention.
     /// </summary>
     public interface IDomainService : ITransientDependency
     {