diff --git a/db/migrate/20110225190919_create_conversations_and_messages_and_visibilities.rb b/db/migrate/20110225190919_create_conversations_and_messages_and_visibilities.rb
index 1a56ce8b8..b9c7b9bf9 100644
--- a/db/migrate/20110225190919_create_conversations_and_messages_and_visibilities.rb
+++ b/db/migrate/20110225190919_create_conversations_and_messages_and_visibilities.rb
@@ -27,11 +27,7 @@ class CreateConversationsAndMessagesAndVisibilities < ActiveRecord::Migration
 
     add_index :conversation_visibilities, :person_id
     add_index :conversation_visibilities, :conversation_id
-    if defined?(ActiveRecord::ConnectionAdapters::PostgreSQLAdapter) && ActiveRecord::Base.connection.is_a?(ActiveRecord::ConnectionAdapters::PostgreSQLAdapter)
-      add_index :conversation_visibilities, [:conversation_id, :person_id], :unique => true, :name => 'index_conversation_visibilities_on_everything'
-    else
-      add_index :conversation_visibilities, [:conversation_id, :person_id], :unique => true
-    end
+    add_index :conversation_visibilities, [:conversation_id, :person_id], :unique => true, :name => 'index_conversation_visibilities_usefully'
     add_index :messages, :author_id
   end