diff --git a/modules/xls_export/lib/open_project/xls_export/xls_views/cost_entry_table.xls.rb b/modules/xls_export/lib/open_project/xls_export/xls_views/cost_entry_table.xls.rb
index 799b809a4e..e6ebdf0ef4 100644
--- a/modules/xls_export/lib/open_project/xls_export/xls_views/cost_entry_table.xls.rb
+++ b/modules/xls_export/lib/open_project/xls_export/xls_views/cost_entry_table.xls.rb
@@ -29,7 +29,7 @@ class OpenProject::XlsExport::XlsViews::CostEntryTable < OpenProject::XlsExport:
               else
                 ['', '', show_result(query)]
               end
-    spreadsheet.add_row(footer) # footer
+    spreadsheet.add_sums(footer) # footer
   end
 
   def headers
diff --git a/modules/xls_export/lib/open_project/xls_export/xls_views/simple_cost_report_table.xls.rb b/modules/xls_export/lib/open_project/xls_export/xls_views/simple_cost_report_table.xls.rb
index 48f5841516..bf592389a1 100644
--- a/modules/xls_export/lib/open_project/xls_export/xls_views/simple_cost_report_table.xls.rb
+++ b/modules/xls_export/lib/open_project/xls_export/xls_views/simple_cost_report_table.xls.rb
@@ -37,7 +37,7 @@ class OpenProject::XlsExport::XlsViews::SimpleCostReportTable < OpenProject::Xls
     footer << show_result(query)
     footer << cost_type_unit_label(unit_id, cost_type) if show_unit_label?
 
-    spreadsheet.add_row(footer)
+    spreadsheet.add_sums(footer)
   end
 
   def headers