diff --git a/adm/board_form.php b/adm/board_form.php
index 2557f915a..147aea0ff 100644
--- a/adm/board_form.php
+++ b/adm/board_form.php
@@ -54,7 +54,10 @@ if (!isset($board['bo_use_sns'])) {
 
     $result = sql_query(" select bo_table from `{$g4['board_table']}` ");
     for ($i=0; $row=sql_fetch_array($result); $i++) {
-        sql_query(" ALTER TABLE `{$g4['write_prefix']}{$row['bo_table']}` ADD `wr_sns` SET( 'fb', 'tw', 'me', 'gp' ) NOT NULL AFTER `wr_ip` ", false);
+        sql_query(" ALTER TABLE `{$g4['write_prefix']}{$row['bo_table']}` 
+                    ADD `wr_facebook_user` VARCHAR(255) NOT NULL DEFAULT '' AFTER `wr_ip`,
+                    ADD `wr_twitter_user` VARCHAR(255) NOT NULL DEFAULT '' AFTER `wr_facebook_user`,
+                    ADD `wr_me2day_user` VARCHAR(255) NOT NULL DEFAULT '' AFTER `wr_twitter_user` ", false);
     }
 }
 
diff --git a/adm/sql_write.sql b/adm/sql_write.sql
index d84badc4f..f6e2bdd2a 100644
--- a/adm/sql_write.sql
+++ b/adm/sql_write.sql
@@ -26,7 +26,9 @@ CREATE TABLE `__TABLE_NAME__` (
   `wr_datetime` datetime NOT NULL DEFAULT '0000-00-00 00:00:00',
   `wr_last` varchar(19) NOT NULL,
   `wr_ip` varchar(255) NOT NULL,
-  `wr_sns` set('fb','tw','me','gp') NOT NULL,
+  `wr_facebook_user` varchar(255) NOT NULL,
+  `wr_twitter_user` varchar(255) NOT NULL,
+  `wr_me2day_user` varchar(255) NOT NULL,
   `wr_1` varchar(255) NOT NULL,
   `wr_2` varchar(255) NOT NULL,
   `wr_3` varchar(255) NOT NULL,