diff --git a/install.php b/install.php
index b94468d5..53a32140 100644
--- a/install.php
+++ b/install.php
@@ -98,7 +98,7 @@ function install_get_default_options(): array {
             'theme:default' => 'a:2:{s:7:"logoUrl";N;s:12:"sidebarBlock";a:5:{i:0;s:15:"ShowRecentPosts";i:1;s:18:"ShowRecentComments";i:2;s:12:"ShowCategory";i:3;s:11:"ShowArchive";i:4;s:9:"ShowOther";}}',
             'timezone' => '28800',
             'lang' => install_get_lang(),
-            'charset' => _('UTF-8'),
+            'charset' => _t('UTF-8'),
             'contentType' => 'text/html',
             'gzip' => 0,
             'generator' => 'Typecho ' . Typecho_Common::VERSION,
@@ -554,7 +554,7 @@ function install_step_2() {
                 <ul class="typecho-option">
                     <li>
                         <label class="typecho-label" for="dbPrefix"><?php _e('数据库前缀'); ?></label>
-                        <input type="text" class="text" name="dbPrefix" id="dbPrefix" value="<?php _v('dbPrefix', 'typecho_'); ?>" />
+                        <input type="text" class="text" name="dbPrefix" id="dbPrefix" value="typecho_" />
                         <p class="description"><?php _e('默认前缀是 "typecho_"'); ?></p>
                     </li>
                 </ul>