diff --git a/lib/ransack.rb b/lib/ransack.rb
index bbcd4e9ad..f47013e8f 100644
--- a/lib/ransack.rb
+++ b/lib/ransack.rb
@@ -26,4 +26,6 @@ class UntraversableAssociationError < StandardError; end;
 
 Ransack::Adapters.object_mapper.require_adapter
 
-ActionController::Base.helper Ransack::Helpers::FormHelper
+ActiveSupport.on_load(:action_controller) do
+  ActionController::Base.helper Ransack::Helpers::FormHelper
+end