diff --git a/booking.reports.inc b/booking.reports.inc
index ef1eb40..387b3bb 100644
--- a/booking.reports.inc
+++ b/booking.reports.inc
@@ -921,7 +921,7 @@ function booking_csv_report() {
   $writer = new XLSXWriter();
   $writer->setAuthor($event->booking_eventname); 
   //Add the header row
-  $writer->writeSheetHeader($sheetname, $column_headings, $header_style);
+  $writer->writeSheetHeader($sheetname, $header_array, $header_style);
 
   //Add the data
   foreach($rows as $row) {