diff --git a/src/pretix/api/views/order.py b/src/pretix/api/views/order.py
index 5148f29df6..a13731d5f9 100644
--- a/src/pretix/api/views/order.py
+++ b/src/pretix/api/views/order.py
@@ -185,7 +185,7 @@ with scopes_disabled():
                 | Q(full_invoice_no__iexact=u)
             ).values_list('order_id', flat=True)
 
-            matching_positions = OrderPosition.objects.filter(
+            matching_positions = OrderPosition.all.filter(
                 Q(order=OuterRef('pk')) & Q(
                     Q(attendee_name_cached__icontains=u) | Q(attendee_email__icontains=u)
                     | Q(secret__istartswith=u)
diff --git a/src/pretix/control/forms/filter.py b/src/pretix/control/forms/filter.py
index 14a0439b5f..1c3a711958 100644
--- a/src/pretix/control/forms/filter.py
+++ b/src/pretix/control/forms/filter.py
@@ -267,7 +267,7 @@ class OrderFilterForm(FilterForm):
                 Q(invoice_no__in=invoice_nos)
                 | Q(full_invoice_no__iexact=u)
             ).values_list('order_id', flat=True)
-            matching_positions = OrderPosition.objects.filter(
+            matching_positions = OrderPosition.all.filter(
                 Q(
                     Q(attendee_name_cached__icontains=u) | Q(attendee_email__icontains=u)
                     | Q(company__icontains=u)