diff --git a/src/pretix/plugins/reports/exporters.py b/src/pretix/plugins/reports/exporters.py
index 57d1c2f30f..2a255e3e87 100644
--- a/src/pretix/plugins/reports/exporters.py
+++ b/src/pretix/plugins/reports/exporters.py
@@ -430,8 +430,8 @@ class OrderTaxListReport(Report):
             [
                 _('Total'), '', '', '', ''
             ] + sum(([
-                localize(round_decimal(price_sums.get(t), self.event.currency)),
-                localize(round_decimal(tax_sums.get(t), self.event.currency))
+                localize(round_decimal(price_sums.get(t) or Decimal('0.00'), self.event.currency)),
+                localize(round_decimal(tax_sums.get(t) or Decimal('0.00'), self.event.currency))
             ] for t in tax_rates), []),
         )