diff --git a/db/migrate/20091219061442_create_visitor_indexes.rb b/db/migrate/20091219061442_create_visitor_indexes.rb
new file mode 100644
index 0000000..7547d95
--- /dev/null
+++ b/db/migrate/20091219061442_create_visitor_indexes.rb
@@ -0,0 +1,9 @@
+class CreateVisitorIndexes < ActiveRecord::Migration
+  def self.up
+    add_index :visitors, [:identifier, :site_id], :unique => true
+  end
+
+  def self.down
+    remove_index :visitors, [:identifier, :site_id]
+  end
+end
diff --git a/db/migrate/20091219063003_remove_extraneous_index.rb b/db/migrate/20091219063003_remove_extraneous_index.rb
new file mode 100644
index 0000000..c100d74
--- /dev/null
+++ b/db/migrate/20091219063003_remove_extraneous_index.rb
@@ -0,0 +1,9 @@
+class RemoveExtraneousIndex < ActiveRecord::Migration
+  def self.up
+    remove_index :prompts, [:left_choice_id, :right_choice_id]
+  end
+
+  def self.down
+    add_index :prompts, [:left_choice_id, :right_choice_id]
+  end
+end
--
libgit2 0.21.2