diff --git a/db/newsgroup.sql b/db/newsgroup.sql
index fc86142..09f64c1 100644
--- a/db/newsgroup.sql
+++ b/db/newsgroup.sql
@@ -20,4 +20,8 @@ create table newsgroup_message (
     FOREIGN KEY(newsgroup_id) REFERENCES newsgroup(id)
 );
 
+create index newsgroup_message_newsgroup_id_idx on newsgroup_message (
+    newsgroup_id, id
+);
+
 commit;