diff --git a/includes/commerce_coupon.checkout_pane.inc b/includes/commerce_coupon.checkout_pane.inc
index 6d61104..4c624f7 100644
--- a/includes/commerce_coupon.checkout_pane.inc
+++ b/includes/commerce_coupon.checkout_pane.inc
@@ -149,6 +149,12 @@ function commerce_coupon_add_coupon_callback($form, &$form_state) {
   $coupon_pane = $form['commerce_coupon'];
   $commands[] = ajax_command_replace('#commerce-checkout-coupon-ajax-wrapper', drupal_render($coupon_pane));
 
+  // Re-render the payment details pane if we are on the payment page to accommodate free orders.
+  if (!empty($form['commerce_payment'])) {
+    $payment_pane = $form['commerce_payment'];
+    $commands[] = ajax_command_replace('.commerce_payment', drupal_render($payment_pane));
+  }
+
   // Allow other modules to alter the commands.
   drupal_alter('commerce_coupon_add_coupon_ajax', $commands, $form, $form_state);