diff --git a/adminer/include/auth.inc.php b/adminer/include/auth.inc.php
index ff17886c..df66b485 100644
--- a/adminer/include/auth.inc.php
+++ b/adminer/include/auth.inc.php
@@ -71,7 +71,7 @@ if (!function_exists('is_server_host_valid')) {
  */
 function build_http_url($server, $username, $password, $defaultServer, $defaultPort = null) {
 	if (!preg_match('~^(https?://)?([^:]*)(:\d+)?$~', rtrim($server, '/'), $matches)) {
-		$this->error = lang('Invalid server or credentials.');
+		auth_error(lang('Invalid server or credentials.'));
 		return false;
 	}