diff --git a/addons/website_blog/controllers/main.py b/addons/website_blog/controllers/main.py
index 522976410ab..5cb678b5475 100644
--- a/addons/website_blog/controllers/main.py
+++ b/addons/website_blog/controllers/main.py
@@ -138,9 +138,9 @@ class WebsiteBlog(http.Controller):
         domain = []
 
         if blog:
-            domain += [("id", "in", [post.id for post in blog.blog_post_ids])]
+            domain += [('blog_id', '=', blog.id)]
         if tag:
-            domain += [("id", "in", [post.id for post in tag.blog_post_ids])]
+            domain += [('tag_ids', 'in', tag.id)]
         if date_begin and date_end:
             domain += [("create_date", ">=", date_begin), ("create_date", "<=", date_end)]