diff --git a/app/controllers/spree/admin/reports_controller_decorator.rb b/app/controllers/spree/admin/reports_controller_decorator.rb
index bdaf8b50b4..6de3fc1575 100644
--- a/app/controllers/spree/admin/reports_controller_decorator.rb
+++ b/app/controllers/spree/admin/reports_controller_decorator.rb
@@ -99,7 +99,7 @@ Spree::Admin::ReportsController.class_eval do
 
       columns = [ proc { |lis| lis.first.variant.product.supplier.name },
         proc { |lis| lis.first.variant.product.name },
-        proc { |lis| lis.first.variant.product.group_buy_unit_size || 0.0 },
+        proc { |lis| lis.first.variant.product.group_buy ? (lis.first.variant.product.group_buy_unit_size || 0.0) : "" },
         proc { |lis| lis.first.variant.options_text },
         proc { |lis| lis.first.variant.weight || 0 },
         proc { |lis|  lis.sum { |li| li.quantity } },
@@ -113,7 +113,7 @@ Spree::Admin::ReportsController.class_eval do
         sort_by: proc { |product| product.name },
         summary_columns: [ proc { |lis| lis.first.variant.product.supplier.name },
           proc { |lis| lis.first.variant.product.name },
-          proc { |lis| lis.first.variant.product.group_buy_unit_size || 0.0 },
+          proc { |lis| lis.first.variant.product.group_buy ? (lis.first.variant.product.group_buy_unit_size || 0.0) : "" },
           proc { |lis| "" },
           proc { |lis| "" },
           proc { |lis| lis.sum { |li| (li.quantity || 0) * (li.variant.weight || 0) } },
@@ -129,7 +129,7 @@ Spree::Admin::ReportsController.class_eval do
 
       columns = [ proc { |lis| lis.first.order.bill_address.firstname + " " + lis.first.order.bill_address.lastname },
         proc { |lis| lis.first.variant.product.name },
-        proc { |lis| lis.first.variant.product.group_buy_unit_size || 0.0 },
+        proc { |lis| lis.first.variant.product.group_buy ? (lis.first.variant.product.group_buy_unit_size || 0.0) : "" },
         proc { |lis| lis.first.variant.options_text },
         proc { |lis| lis.first.variant.weight || 0 },
         proc { |lis| lis.sum { |li| li.quantity } },
@@ -141,7 +141,7 @@ Spree::Admin::ReportsController.class_eval do
         sort_by: proc { |product| product.name },
         summary_columns: [ proc { |lis| "TOTAL" },
           proc { |lis| lis.first.variant.product.name },
-          proc { |lis| lis.first.variant.product.group_buy_unit_size || 0.0 },
+          proc { |lis| lis.first.variant.product.group_buy ? (lis.first.variant.product.group_buy_unit_size || 0.0) : "" },
           proc { |lis| "" },
           proc { |lis| "" },
           proc { |lis| lis.sum { |li| li.quantity * (li.variant.weight || 0) } },
@@ -188,7 +188,7 @@ Spree::Admin::ReportsController.class_eval do
 
       columns = [ proc { |lis| lis.first.variant.product.supplier.name },
         proc { |lis| lis.first.variant.product.name },
-        proc { |lis| lis.first.variant.product.group_buy_unit_size || 0.0 },
+        proc { |lis| lis.first.variant.product.group_buy ? (lis.first.variant.product.group_buy_unit_size || 0.0) : "" },
         proc { |lis| lis.first.variant.options_text },
         proc { |lis| lis.first.variant.weight || 0 },
         proc { |lis|  lis.sum { |li| li.quantity } },
@@ -202,7 +202,7 @@ Spree::Admin::ReportsController.class_eval do
         sort_by: proc { |product| product.name },
         summary_columns: [ proc { |lis| lis.first.variant.product.supplier.name },
           proc { |lis| lis.first.variant.product.name },
-          proc { |lis| lis.first.variant.product.group_buy_unit_size || 0.0 },
+          proc { |lis| lis.first.variant.product.group_buy ? (lis.first.variant.product.group_buy_unit_size || 0.0) : "" },
           proc { |lis| "" },
           proc { |lis| "" },
           proc { |lis| lis.sum { |li| li.quantity * (li.variant.weight || 0) } },