diff --git a/SQL/mysql.initial.sql b/SQL/mysql.initial.sql
index fadc07280..ec420734f 100644
--- a/SQL/mysql.initial.sql
+++ b/SQL/mysql.initial.sql
@@ -55,7 +55,7 @@ CREATE TABLE `identities` (
   `email` varchar(128) NOT NULL,
   `reply-to` varchar(128) NOT NULL default '',
   `bcc` varchar(128) NOT NULL default '',
-  `signature` text NOT NULL default '',
+  `signature` text,
   `html_signature` tinyint(1) NOT NULL default '0',
   PRIMARY KEY  (`identity_id`),
   KEY `user_id` (`user_id`)
diff --git a/SQL/mysql.update.sql b/SQL/mysql.update.sql
index 2a9603f3e..f07672614 100644
--- a/SQL/mysql.update.sql
+++ b/SQL/mysql.update.sql
@@ -19,7 +19,7 @@ ALTER TABLE `users`
 -- Updates from version 0.1.1
 
 ALTER TABLE `identities`
-    MODIFY `signature` text NOT NULL DEFAULT '', 
+    MODIFY `signature` text, 
     MODIFY `bcc` varchar(128) NOT NULL DEFAULT '', 
     MODIFY `reply-to` varchar(128) NOT NULL DEFAULT '', 
     MODIFY `organization` varchar(128) NOT NULL DEFAULT '',
diff --git a/SQL/mysql5.initial.sql b/SQL/mysql5.initial.sql
index 546eecd29..7e3dd9a73 100644
--- a/SQL/mysql5.initial.sql
+++ b/SQL/mysql5.initial.sql
@@ -111,7 +111,7 @@ CREATE TABLE `identities` (
  `email` varchar(128) NOT NULL,
  `reply-to` varchar(128) NOT NULL DEFAULT '',
  `bcc` varchar(128) NOT NULL DEFAULT '',
- `signature` text NOT NULL DEFAULT '',
+ `signature` text,
  `html_signature` tinyint(1) NOT NULL DEFAULT '0',
  `user_id` int(10) UNSIGNED NOT NULL DEFAULT '0',
  PRIMARY KEY(`identity_id`),