diff --git a/storefront/cart.py b/storefront/cart.py
index aaaa673..32cfb90 100644
--- a/storefront/cart.py
+++ b/storefront/cart.py
@@ -166,7 +166,7 @@ class Cart:
             elif item.quantity > item.variant.product.checkout_limit:
                 messages.warning(self.request, 'Quantity exceeds checkout limit.')
                 item.quantity = item.variant.product.checkout_limit
-            elif item.quantity > item.variant.order_limit:
+            elif item.variant.order_limit and (item.quantity > item.variant.order_limit):
                 messages.warning(self.request, 'Quantity exceeds order limit.')
                 item.quantity = item.variant.order_limit