diff --git a/includes/pages/admin_active.php b/includes/pages/admin_active.php
index 8d71b147..daa2382b 100644
--- a/includes/pages/admin_active.php
+++ b/includes/pages/admin_active.php
@@ -5,7 +5,7 @@ function admin_active_title() {
 }
 
 function admin_active() {
-  global $tshirt_sizes;
+  global $tshirt_sizes, $shift_sum_formula;
   
   $msg = "";
   $search = "";