diff --git a/lib/reporting/reports/sales_tax/tax_rates.rb b/lib/reporting/reports/sales_tax/tax_rates.rb
index afc62ac3c8..83bd3f2eb0 100644
--- a/lib/reporting/reports/sales_tax/tax_rates.rb
+++ b/lib/reporting/reports/sales_tax/tax_rates.rb
@@ -11,7 +11,7 @@ module Reporting
             total_excl_vat: proc { |order| order.total - order.total_tax }
           }
           add_key_for_each_rate(result, proc { |rate|
-            OrderTaxAdjustmentsFetcher.new(order).totals.fetch(rate, 0)
+            proc { |order| OrderTaxAdjustmentsFetcher.new(order).totals.fetch(rate, 0) }
           })
           other = {
             total_tax: proc { |order| order.total_tax },