diff --git a/booking.variety_admin.inc b/booking.variety_admin.inc
index 254698a..37718b2 100644
--- a/booking.variety_admin.inc
+++ b/booking.variety_admin.inc
@@ -623,7 +623,7 @@ function booking_varietysessions_csv_report($timeslot_id) {
   }
   
   //output the CSV to the browser
-  drupal_add_http_header("Content-type", "application/octet-stream; charset=utf-8");
+  drupal_add_http_header("Content-type", "text/csv; charset=utf-8");
   drupal_add_http_header("Content-Disposition", "attachment; filename=" . $name . ".csv");
   print $csv;
   exit(0);