diff --git a/emhttp/plugins/dynamix/scripts/flash_backup b/emhttp/plugins/dynamix/scripts/flash_backup
index 1631f5f74..b628c9945 100755
--- a/emhttp/plugins/dynamix/scripts/flash_backup
+++ b/emhttp/plugins/dynamix/scripts/flash_backup
@@ -20,7 +20,7 @@ $out = ['prev','previous'];
 
 $server = isset($var['NAME']) ? str_replace(' ','_',strtolower($var['NAME'])) : 'tower';
 $mydate = date('Ymd-Hi');
-$osVersion = @$var['version'] ?? '_unknown';
+$osVersion = _var($var,'version','_unknown');
 $backup = "$server-v$osVersion-flash-backup-$mydate.zip";
 
 $used = exec("df /boot|awk 'END{print $3}'") * 1.5;