diff --git a/admin/install.php b/admin/install.php
index 8b3234cf..cbc4bcd9 100644
--- a/admin/install.php
+++ b/admin/install.php
@@ -3,7 +3,7 @@
  * @Author: printempw
  * @Date:   2016-01-16 23:01:33
  * @Last Modified by:   printempw
- * @Last Modified time: 2016-03-05 19:22:44
+ * @Last Modified time: 2016-03-12 16:44:47
  *
  * Create tables automatically
  */
@@ -15,7 +15,7 @@ header('Content-type: text/html; charset=utf-8');
 echo "<style>body { font-family: Courier, 'Microsoft Yahei', 'Microsoft Jhenghei', sans-serif; }</style>";
 
 if (!file_exists("./install.lock")) {
-	$conn = new mysqli(DB_HOST, DB_USER, DB_PASSWD, DB_NAME);
+	$conn = new mysqli(DB_HOST, DB_USER, DB_PASSWD, DB_NAME, DB_PORT);
 
 	echo "<h2>Blessing Skin Server 安装程序</h2>";
 
diff --git a/config.example.php b/config.example.php
index 1dddb726..0ac72c36 100644
--- a/config.example.php
+++ b/config.example.php
@@ -8,6 +8,9 @@ define('DB_USER', 'root');
 /* MySQL 连接密码 */
 define('DB_PASSWD', 'root');
 
+/* MySQL 端口，默认 3306 */
+define('DB_PORT', 3306);
+
 /* MySQL 主机 */
 define('DB_HOST', 'localhost');
 
diff --git a/includes/Database.class.php b/includes/Database.class.php
index c030e0f3..29e4f603 100644
--- a/includes/Database.class.php
+++ b/includes/Database.class.php
@@ -3,7 +3,7 @@
  * @Author: printempw
  * @Date:   2016-02-02 21:59:06
  * @Last Modified by:   printempw
- * @Last Modified time: 2016-03-06 13:41:24
+ * @Last Modified time: 2016-03-12 16:43:53
  */
 
 class Database
@@ -15,7 +15,7 @@ class Database
     }
 
     public static function checkConfig() {
-        $conn = new mysqli(DB_HOST, DB_USER, DB_PASSWD, DB_NAME);
+        $conn = new mysqli(DB_HOST, DB_USER, DB_PASSWD, DB_NAME, DB_PORT);
         if ($conn->connect_error) {
             Utils::raise(-1, "Can not connect to mysql, check if database info correct in config.php. ".
                                 $conn->connect_error);