diff --git a/app/documents/group_order_invoice_pdf.rb b/app/documents/group_order_invoice_pdf.rb
index aba39506..31ee4384 100644
--- a/app/documents/group_order_invoice_pdf.rb
+++ b/app/documents/group_order_invoice_pdf.rb
@@ -1,4 +1,4 @@
-class GroupOrderInvoicePdf < RenderPDF
+class GroupOrderInvoicePdf < RenderPdf
   def filename
     I18n.t('documents.group_order_invoice_pdf.filename', :number => @options[:invoice_number]) + '.pdf'
   end
@@ -72,7 +72,7 @@ class GroupOrderInvoicePdf < RenderPDF
       body_with_vat
     end
   end
-  
+
   def body_for_vat_exempt
     total_gross = 0
     data = [I18n.t('documents.group_order_invoice_pdf.vat_exempt_rows')]