diff --git a/db/migrate/20140617193351_add_post_id_index_on_topic_links.rb b/db/migrate/20140617193351_add_post_id_index_on_topic_links.rb
new file mode 100644
index 000000000..aae44fbc1
--- /dev/null
+++ b/db/migrate/20140617193351_add_post_id_index_on_topic_links.rb
@@ -0,0 +1,9 @@
+class AddPostIdIndexOnTopicLinks < ActiveRecord::Migration
+  def up
+    add_index :topic_links, :post_id
+  end
+
+  def down
+    remove_index :topic_links, :post_id
+  end
+end