diff --git a/modules/cms-kit/src/Volo.CmsKit.EntityFrameworkCore/Volo/CmsKit/Comments/EfCoreCommentRepository.cs b/modules/cms-kit/src/Volo.CmsKit.EntityFrameworkCore/Volo/CmsKit/Comments/EfCoreCommentRepository.cs
index 3116d191ba..44d5000c8a 100644
--- a/modules/cms-kit/src/Volo.CmsKit.EntityFrameworkCore/Volo/CmsKit/Comments/EfCoreCommentRepository.cs
+++ b/modules/cms-kit/src/Volo.CmsKit.EntityFrameworkCore/Volo/CmsKit/Comments/EfCoreCommentRepository.cs
@@ -67,7 +67,7 @@ public class EfCoreCommentRepository : EfCoreRepository<ICmsKitDbContext, Commen
             creationEndDate,
             token);
 
-        if (sorting != null)
+        if (!sorting.IsNullOrEmpty())
         {
             sorting = "comment." + sorting;
         }