diff --git a/install/sql/mysql.sql b/install/sql/mysql.sql
index 71d05fb14..c13b460f3 100644
--- a/install/sql/mysql.sql
+++ b/install/sql/mysql.sql
@@ -1047,7 +1047,7 @@ CREATE TABLE IF NOT EXISTS `bb_privmsgs`
 (
   `privmsgs_id`          MEDIUMINT(8) UNSIGNED NOT NULL AUTO_INCREMENT,
   `privmsgs_type`        TINYINT(4)            NOT NULL DEFAULT '0',
-  `privmsgs_subject`     VARCHAR(255)          NOT NULL DEFAULT '0',
+  `privmsgs_subject`     VARCHAR(255)          NOT NULL DEFAULT '',
   `privmsgs_from_userid` MEDIUMINT(8)          NOT NULL DEFAULT '0',
   `privmsgs_to_userid`   MEDIUMINT(8)          NOT NULL DEFAULT '0',
   `privmsgs_date`        INT(11)               NOT NULL DEFAULT '0',