Named indicies too long

When creating a migration with a lot of primary keys (or one with a long table):

    create_table :really_long_table_name do |t|
      t.integer :another_column_thats_long
      t.integer :this_is_a_column
    end

    add_index :really_long_table_name, [:another_column_thats_long, :this_is_a_column]

causes SQLite (and some other db packages) to take a fit because Index Names can't be > 64 characters in length. Could you just truncate the index names at 64 characters?