diff --git a/src/web/server/admin/upgrade_maestro.php b/src/web/server/admin/upgrade_maestro.php
index 1f4ac88..c2e32f2 100644
--- a/src/web/server/admin/upgrade_maestro.php
+++ b/src/web/server/admin/upgrade_maestro.php
@@ -19,7 +19,7 @@ change_upgrade_request_status_to_close($maestro_id);
 change_upgrade_request_status_to_applied($maestro_upgrade_id);
 
 $maestro_data = get_maestro_data($maestro_id);
-sendMailUpgradeDone($maestro_data["name"], $$maestro_data["email"], $registered_account_type, $upgrade_account_type);
+sendMailUpgradeDone($maestro_data["name"], $maestro_data["email"], $registered_account_type, $upgrade_account_type);
 
 // set_data("maestro_upgrade_id", $maestro_upgrade_id);
 // set_data("maestro_id", $maestro_id);