diff --git a/src/shop/views.py b/src/shop/views.py
index 315e0032..5968ab58 100644
--- a/src/shop/views.py
+++ b/src/shop/views.py
@@ -350,6 +350,7 @@ class OrderReviewAndPayView(
     LoginRequiredMixin,
     EnsureUserOwnsOrderMixin,
     EnsureOrderHasProductsMixin,
+    EnsureUnpaidOrderMixin,
     EnsureOrderIsNotCancelledMixin,
     DetailView,
 ):