diff --git a/app/controllers/checkout_controller.rb b/app/controllers/checkout_controller.rb
index 1b8cd07d67..a1c69500bf 100644
--- a/app/controllers/checkout_controller.rb
+++ b/app/controllers/checkout_controller.rb
@@ -14,7 +14,7 @@ class CheckoutController < ::BaseController
 
   # We need pessimistic locking to avoid race conditions.
   # Otherwise we fail on duplicate indexes or end up with negative stock.
-  prepend_around_action CurrentOrderLocker, only: :update
+  prepend_around_action CurrentOrderLocker, only: [:edit, :update]
 
   prepend_before_action :check_hub_ready_for_checkout
   prepend_before_action :check_order_cycle_expiry