diff --git a/adm/member_form.php b/adm/member_form.php
index 0474d95dc..2ea7dad6b 100644
--- a/adm/member_form.php
+++ b/adm/member_form.php
@@ -83,10 +83,12 @@ if ($mb['mb_open']) {
 
 if(!isset($mb['mb_adult'])) {
     sql_query(" ALTER TABLE `{$g4['member_table']}`
-                    ADD `mb_adult` ENUM('Y', 'N') NOT NULL DEFAULT 'N' AFTER `mb_birth`,
-                    ADD `mb_hp_certify` DATETIME NOT NULL DEFAULT '0000-00-00 00:00:00' AFTER `mb_lost_certify` ", FALSE);
+                    ADD `mb_adult` ENUM('N', 'Y') NOT NULL DEFAULT 'N' AFTER `mb_birth`,
+                    ADD `mb_hp_certify` DATETIME NOT NULL DEFAULT '0000-00-00 00:00:00' AFTER `mb_lost_certify` ", false);
 }
 
+sql_query(" ALTER TABLE `{$g4['member_table']}` CHANGE `mb_adult` `mb_adult` ENUM('N','Y') NOT NULL DEFAULT 'N' ", false);
+
 if ($mb['mb_intercept_date']) $g4['title'] = "차단된 ";
 else $g4['title'] .= "";
 $g4['title'] .= '회원 '.$html_title;
diff --git a/install/gnuboard4s.sql b/install/gnuboard4s.sql
index 3b24e1ebc..e0566f117 100644
--- a/install/gnuboard4s.sql
+++ b/install/gnuboard4s.sql
@@ -411,7 +411,7 @@ CREATE TABLE IF NOT EXISTS `g4s_member` (
   `mb_jumin` varchar(255) NOT NULL default '',
   `mb_sex` char(1) NOT NULL default '',
   `mb_birth` varchar(255) NOT NULL default '',
-  `mb_adult` enum('Y','N') NOT NULL default 'N',
+  `mb_adult` enum('N','Y') NOT NULL default 'N',
   `mb_tel` varchar(255) NOT NULL default '',
   `mb_hp` varchar(255) NOT NULL default '',
   `mb_zip1` char(3) NOT NULL default '',