diff --git a/report_tickets_unbilled.php b/report_tickets_unbilled.php
index 7accfbbf..6c298f47 100644
--- a/report_tickets_unbilled.php
+++ b/report_tickets_unbilled.php
@@ -119,7 +119,7 @@ $rows = 0;
                             AND
                                 ticket_client_id = $client_id
                             AND
-                                ticket_status = 'Closed'
+                                ticket_closed_at IS NOT NULL
                             AND
                                 ticket_billable = 1
                         ");
@@ -138,7 +138,7 @@ $rows = 0;
                             AND
                                 ticket_client_id = $client_id
                             AND
-                                ticket_status = 'Closed'
+                                ticket_closed_at IS NOT NULL
                             AND
                                 ticket_billable = 1
                             AND