diff --git a/lib/open_food_network/orders_and_fulfillments_report/distributor_totals_by_supplier_report.rb b/lib/open_food_network/orders_and_fulfillments_report/distributor_totals_by_supplier_report.rb
index cfb1a1f3f9..d9828e6aef 100644
--- a/lib/open_food_network/orders_and_fulfillments_report/distributor_totals_by_supplier_report.rb
+++ b/lib/open_food_network/orders_and_fulfillments_report/distributor_totals_by_supplier_report.rb
@@ -59,7 +59,7 @@ module OpenFoodNetwork
          proc { |line_items| line_items.first.variant.product.supplier.name },
          proc { |line_items| line_items.first.variant.product.name },
          proc { |line_items| line_items.first.variant.full_name },
-         proc { |line_items| line_items.sum(:quantity) },
+         proc { |line_items| line_items.to_a.sum(&:quantity) },
          proc { |line_items| line_items.first.price },
          proc { |line_items| line_items.sum(&:amount) },
          proc { |_line_items| "" },
diff --git a/lib/open_food_network/orders_and_fulfillments_report/supplier_totals_by_distributor_report.rb b/lib/open_food_network/orders_and_fulfillments_report/supplier_totals_by_distributor_report.rb
index cddc962f49..98aa381a79 100644
--- a/lib/open_food_network/orders_and_fulfillments_report/supplier_totals_by_distributor_report.rb
+++ b/lib/open_food_network/orders_and_fulfillments_report/supplier_totals_by_distributor_report.rb
@@ -60,7 +60,7 @@ module OpenFoodNetwork
           proc { |line_items| line_items.first.variant.product.name },
           proc { |line_items| line_items.first.variant.full_name },
           proc { |line_items| line_items.first.order.distributor.name },
-          proc { |line_items| line_items.sum(:quantity) },
+          proc { |line_items| line_items.to_a.sum(&:quantity) },
           proc { |line_items| line_items.first.price },
           proc { |line_items| line_items.sum(&:amount) },
           proc { |_line_items| I18n.t(:report_header_shipping_method) }
diff --git a/lib/open_food_network/orders_and_fulfillments_report/supplier_totals_report.rb b/lib/open_food_network/orders_and_fulfillments_report/supplier_totals_report.rb
index 3029cf19b3..a7a341664c 100644
--- a/lib/open_food_network/orders_and_fulfillments_report/supplier_totals_report.rb
+++ b/lib/open_food_network/orders_and_fulfillments_report/supplier_totals_report.rb
@@ -44,7 +44,7 @@ module OpenFoodNetwork
           supplier_name,
           product_name,
           line_items_name,
-          proc { |line_items| line_items.sum(:quantity) },
+          proc { |line_items| line_items.to_a.sum(&:quantity) },
           proc { |line_items| total_units(line_items) },
           proc { |line_items| line_items.first.price },
           proc { |line_items| line_items.sum(&:amount) },