diff --git a/db/migrate/20151120090455_index_domains_on_name.rb b/db/migrate/20151120090455_index_domains_on_name.rb
new file mode 100644
index 000000000..a429b6fbf
--- /dev/null
+++ b/db/migrate/20151120090455_index_domains_on_name.rb
@@ -0,0 +1,5 @@
+class IndexDomainsOnName < ActiveRecord::Migration
+  def change
+    add_index :domains, :name, unique: true
+  end
+end