diff --git a/lib/cuprum/collections/commands/abstract_find_matching.rb b/lib/cuprum/collections/commands/abstract_find_matching.rb
index bd67cad..69b01ed 100644
--- a/lib/cuprum/collections/commands/abstract_find_matching.rb
+++ b/lib/cuprum/collections/commands/abstract_find_matching.rb
@@ -1,6 +1,7 @@
 # frozen_string_literal: true
 
 require 'cuprum/collections/commands'
+require 'cuprum/collections/constraints/ordering'
 require 'cuprum/collections/errors/invalid_query'
 
 module Cuprum::Collections::Commands