diff --git a/src/pretix/base/services/cross_selling.py b/src/pretix/base/services/cross_selling.py
index 867e006991..e36db7844a 100644
--- a/src/pretix/base/services/cross_selling.py
+++ b/src/pretix/base/services/cross_selling.py
@@ -88,7 +88,7 @@ class CrossSellingService:
         potential_discounts_by_cartpos = defaultdict(list)
 
         from ..services.pricing import apply_discounts
-        apply_discounts(
+        self._discounted_prices = apply_discounts(
             self.event,
             self.sales_channel,
             [