diff --git a/lib/Froxlor/Cron/Dns/DnsBase.php b/lib/Froxlor/Cron/Dns/DnsBase.php
index 10c5c981..c68631da 100644
--- a/lib/Froxlor/Cron/Dns/DnsBase.php
+++ b/lib/Froxlor/Cron/Dns/DnsBase.php
@@ -195,14 +195,14 @@ abstract class DnsBase
 
 			while ($domain = $result_domains_stmt->fetch(\PDO::FETCH_ASSOC)) {
 
-				$privkey_filename = \Froxlor\FileDir::makeCorrectFile(Settings::Get('dkim.dkim_prefix') . '/dkim' . $domain['dkim_id']);
+				$privkey_filename = \Froxlor\FileDir::makeCorrectFile(Settings::Get('dkim.dkim_prefix') . '/dkim' . $domain['dkim_id'] . '.priv');
 				$pubkey_filename = \Froxlor\FileDir::makeCorrectFile(Settings::Get('dkim.dkim_prefix') . '/dkim' . $domain['dkim_id'] . '.public');
 
 				if ($domain['dkim_privkey'] == '' || $domain['dkim_pubkey'] == '') {
 					$max_dkim_id_stmt = Database::query("SELECT MAX(`dkim_id`) as `max_dkim_id` FROM `" . TABLE_PANEL_DOMAINS . "`");
 					$max_dkim_id = $max_dkim_id_stmt->fetch(\PDO::FETCH_ASSOC);
 					$domain['dkim_id'] = (int) $max_dkim_id['max_dkim_id'] + 1;
-					$privkey_filename = \Froxlor\FileDir::makeCorrectFile(Settings::Get('dkim.dkim_prefix') . '/dkim' . $domain['dkim_id']);
+					$privkey_filename = \Froxlor\FileDir::makeCorrectFile(Settings::Get('dkim.dkim_prefix') . '/dkim' . $domain['dkim_id'] . '.priv');
 					\Froxlor\FileDir::safe_exec('openssl genrsa -out ' . escapeshellarg($privkey_filename) . ' ' . Settings::Get('dkim.dkim_keylength'));
 					$domain['dkim_privkey'] = file_get_contents($privkey_filename);
 					\Froxlor\FileDir::safe_exec("chmod 0640 " . escapeshellarg($privkey_filename));