diff --git a/install/sql/mysql.sql b/install/sql/mysql.sql
index e92f1fc59..92d9d1a41 100644
--- a/install/sql/mysql.sql
+++ b/install/sql/mysql.sql
@@ -802,8 +802,8 @@ CREATE TABLE IF NOT EXISTS `bb_groups` (
   `group_type`        TINYINT(4)   NOT NULL DEFAULT '1',
   `release_group`     TINYINT(4)   NOT NULL DEFAULT '0',
   `group_name`        VARCHAR(40)  NOT NULL DEFAULT '',
-  `group_description` TEXT         NOT NULL,
-  `group_signature`   TEXT         NOT NULL,
+  `group_description` TEXT         NOT NULL DEFAULT '',
+  `group_signature`   TEXT         NOT NULL DEFAULT '',
   `group_moderator`   MEDIUMINT(8) NOT NULL DEFAULT '0',
   `group_single_user` TINYINT(1)   NOT NULL DEFAULT '1',
   PRIMARY KEY (`group_id`),
@@ -1304,7 +1304,7 @@ CREATE TABLE IF NOT EXISTS `bb_users` (
   `user_icq`            VARCHAR(15)           NOT NULL DEFAULT '',
   `user_website`        VARCHAR(100)          NOT NULL DEFAULT '',
   `user_from`           VARCHAR(100)          NOT NULL DEFAULT '',
-  `user_sig`            TEXT                  NOT NULL,
+  `user_sig`            TEXT                  NOT NULL DEFAULT '',
   `user_occ`            VARCHAR(100)          NOT NULL DEFAULT '',
   `user_interests`      VARCHAR(255)          NOT NULL DEFAULT '',
   `user_actkey`         VARCHAR(32)           NOT NULL DEFAULT '',
diff --git a/install/upgrade/changes.txt b/install/upgrade/changes.txt
index f6cbe4df2..16ea92873 100644
--- a/install/upgrade/changes.txt
+++ b/install/upgrade/changes.txt
@@ -38,3 +38,8 @@ ALTER TABLE `bb_cron` CHANGE `last_run` `last_run` DATETIME NOT NULL DEFAULT '19
 ALTER TABLE `bb_cron` CHANGE `next_run` `next_run` DATETIME NOT NULL DEFAULT '1900-01-01 00:00:00';
 ALTER TABLE `bb_users` CHANGE `user_birthday` `user_birthday` DATE NOT NULL DEFAULT '1900-01-01';
 ALTER TABLE `bb_posts` CHANGE `mc_comment` `mc_comment` TEXT NOT NULL DEFAULT '';
+
+// 2.3.0.2
+ALTER TABLE `bb_users` CHANGE `user_sig` `user_sig` TEXT NOT NULL DEFAULT '';
+ALTER TABLE `bb_groups` CHANGE `group_signature` `group_signature` TEXT NOT NULL DEFAULT '';
+ALTER TABLE `bb_groups` CHANGE `group_description` `group_description` TEXT NOT NULL DEFAULT '';