diff --git a/install/includes/config.php b/install/includes/config.php
index 5d9ae07a..bc6759b3 100644
--- a/install/includes/config.php
+++ b/install/includes/config.php
@@ -26,6 +26,9 @@ if(!isset($error) || !$error) {
 		$config['database_type'] = $config['lua']['database_type'];
 	else if(isset($config['lua']['sql_type'])) // otserv
 		$config['database_type'] = $config['lua']['sql_type'];
+	else {
+		$config['database_type'] = '';
+	}
 
 	$config['database_type'] = strtolower($config['database_type']);
 	if(empty($config['database_type'])) {