diff --git a/adm/config_form.php b/adm/config_form.php
index 53124f92f..411d8679e 100644
--- a/adm/config_form.php
+++ b/adm/config_form.php
@@ -10,14 +10,19 @@ if ($is_admin != 'super')
     alert('최고관리자만 접근 가능합니다.');
 
 if (!isset($config['cf_include_index'])) {
-    sql_query(" ALTER TABLE `{$g4['config_table']}` 
-                    ADD `cf_include_index` VARCHAR(255) NOT NULL AFTER `cf_admin`,  
-                    ADD `cf_include_head` VARCHAR(255) NOT NULL AFTER `cf_include_index`, 
+    sql_query(" ALTER TABLE `{$g4['config_table']}`
+                    ADD `cf_include_index` VARCHAR(255) NOT NULL AFTER `cf_admin`,
+                    ADD `cf_include_head` VARCHAR(255) NOT NULL AFTER `cf_include_index`,
                     ADD `cf_include_tail` VARCHAR(255) NOT NULL AFTER `cf_include_head`,
                     ADD `cf_add_script` TEXT NOT NULL AFTER `cf_include_tail`
             ", TRUE);
 }
 
+if(!isset($config['cf_adult_check'])) {
+    sql_query(" ALTER TABLE `{$g4['config_table']}`
+                    ADD `cf_adult_check` TINYINT(4) NOT NULL DEFAULT '0' AFTER `cf_memo_send_point` ", TRUE);
+}
+
 $g4['title'] = '환경설정';
 include_once ('./admin.head.php');
 
@@ -364,6 +369,10 @@ $pg_anchor = "
         <th scope="row"><label for="cf_register_point">회원가입시 포인트</label></th>
         <td><input type="text" id="cf_register_point" name="cf_register_point" class="frm_input" value="<?=$config['cf_register_point']?>" size="5"> 점</td>
     </tr>
+    <tr>
+        <th scope='row' id="th310"><label for='cf_adult_check'>성인인증 사용</label></th>
+        <td colspan="3"><input type="checkbox" id="cf_adult_check" name="cf_adult_check" value="1" <?=$config['cf_adult_check']?'checked':'';?>> 사용</td>
+    </tr>
     <tr>
         <th scope='row' id="th310"><label for='cf_leave_day'>회원탈퇴후 삭제일</label></th>
         <td colspan="3"><input type="text" id="cf_leave_day" name="cf_leave_day" class="frm_input" value="<?=$config['cf_leave_day']?>" size="2"> 일 후 자동 삭제</td>
diff --git a/adm/config_form_update.php b/adm/config_form_update.php
index b77e19e4a..57b5f29f9 100644
--- a/adm/config_form_update.php
+++ b/adm/config_form_update.php
@@ -99,6 +99,7 @@ $sql = " update {$g4['config_table']}
                  cf_privacy = '{$_POST['cf_privacy']}',
                  cf_open_modify = '{$_POST['cf_open_modify']}',
                  cf_memo_send_point = '{$_POST['cf_memo_send_point']}',
+                 cf_adult_check = '{$_POST['cf_adult_check']}',
                  cf_1_subj = '{$_POST['cf_1_subj']}',
                  cf_2_subj = '{$_POST['cf_2_subj']}',
                  cf_3_subj = '{$_POST['cf_3_subj']}',
diff --git a/install/gnuboard4s.sql b/install/gnuboard4s.sql
index 74dac5354..59abce82d 100644
--- a/install/gnuboard4s.sql
+++ b/install/gnuboard4s.sql
@@ -260,6 +260,7 @@ CREATE TABLE IF NOT EXISTS `g4s_config` (
   `cf_privacy` text NOT NULL,
   `cf_open_modify` int(11) NOT NULL default '0',
   `cf_memo_send_point` int(11) NOT NULL default '0',
+  `cf_adult_check` tinyint(4) NOT NULL default '0',
   `cf_1_subj` varchar(255) NOT NULL default '',
   `cf_2_subj` varchar(255) NOT NULL default '',
   `cf_3_subj` varchar(255) NOT NULL default '',