diff --git a/lib/plugins/acts_as_tree/init.rb b/lib/plugins/acts_as_tree/init.rb
index e45bc11e5..cb8394e97 100644
--- a/lib/plugins/acts_as_tree/init.rb
+++ b/lib/plugins/acts_as_tree/init.rb
@@ -1,3 +1,4 @@
 # frozen_string_literal: true
 
+require File.dirname(__FILE__) + '/lib/active_record/acts/tree'
 ActiveRecord::Base.send :include, ActiveRecord::Acts::Tree