diff --git a/djangocms_blog/models.py b/djangocms_blog/models.py
index f33461e7..320d433a 100644
--- a/djangocms_blog/models.py
+++ b/djangocms_blog/models.py
@@ -663,7 +663,7 @@ def post_content_queryset(self, request=None):
         else:
             post_contents = PostContent.objects
         if self.app_config:
-            post_contents = post_contents.filter(post__namespace=self.app_config.namespace)
+            post_contents = post_contents.filter(post__app_confige=self.app_config)
         if self.current_site:
             post_contents = post_contents.on_site(get_current_site(request))
         post_contents = post_contents.filter(language=language)