diff --git a/src/Form/FoxyStripePurchaseForm.php b/src/Form/FoxyStripePurchaseForm.php
index 8b868ae..bfa3fd4 100644
--- a/src/Form/FoxyStripePurchaseForm.php
+++ b/src/Form/FoxyStripePurchaseForm.php
@@ -257,7 +257,7 @@ protected function getProductActions(FieldList $actions)
             $submit->setAttribute('Disabled', true);
         }
 
-        $this->extend('updateFoxyStripePurchaseFormActions', $fields);
+        $this->extend('updateFoxyStripePurchaseFormActions', $actions);
 
         return $actions;
     }