diff --git a/workflow/engine/classes/model/map/NotificationDeviceMapBuilder.php b/workflow/engine/classes/model/map/NotificationDeviceMapBuilder.php
index 97a2a9823..ce26120b7 100644
--- a/workflow/engine/classes/model/map/NotificationDeviceMapBuilder.php
+++ b/workflow/engine/classes/model/map/NotificationDeviceMapBuilder.php
@@ -71,7 +71,7 @@ class NotificationDeviceMapBuilder
 
         $tMap->addColumn('SYS_LANG', 'SysLang', 'string', CreoleTypes::VARCHAR, false, 10);
 
-        $tMap->addColumn('DEV_REG_ID', 'DevRegId', 'string', CreoleTypes::VARCHAR, true, 150);
+        $tMap->addColumn('DEV_REG_ID', 'DevRegId', 'string', CreoleTypes::LONGVARCHAR, true, null);
 
         $tMap->addColumn('DEV_TYPE', 'DevType', 'string', CreoleTypes::VARCHAR, true, 50);
 
diff --git a/workflow/engine/classes/model/om/BaseNotificationDevice.php b/workflow/engine/classes/model/om/BaseNotificationDevice.php
index 56a8f3bb4..2f33fbf7b 100644
--- a/workflow/engine/classes/model/om/BaseNotificationDevice.php
+++ b/workflow/engine/classes/model/om/BaseNotificationDevice.php
@@ -49,7 +49,7 @@ abstract class BaseNotificationDevice extends BaseObject implements Persistent
      * The value for the dev_reg_id field.
      * @var        string
      */
-    protected $dev_reg_id = '';
+    protected $dev_reg_id;
 
     /**
      * The value for the dev_type field.
@@ -283,7 +283,7 @@ abstract class BaseNotificationDevice extends BaseObject implements Persistent
             $v = (string) $v;
         }
 
-        if ($this->dev_reg_id !== $v || $v === '') {
+        if ($this->dev_reg_id !== $v) {
             $this->dev_reg_id = $v;
             $this->modifiedColumns[] = NotificationDevicePeer::DEV_REG_ID;
         }
diff --git a/workflow/engine/config/schema.xml b/workflow/engine/config/schema.xml
index 3e16c46f2..64ce0a367 100644
--- a/workflow/engine/config/schema.xml
+++ b/workflow/engine/config/schema.xml
@@ -5543,7 +5543,16 @@
     <column name="DEV_UID"          type="VARCHAR" size="32"  required="true"  primaryKey="true" default=""/>
     <column name="USR_UID"          type="VARCHAR" size="32"  required="true"  primaryKey="true" default=""/>
     <column name="SYS_LANG"         type="VARCHAR" size="10"  required="false" default=""/>
-    <column name="DEV_REG_ID"       type="VARCHAR" size="150" required="true"  default=""/>
+    <column name="DEV_REG_ID" type="LONGVARCHAR" required="true">
+      <vendor type="mysql">
+        <parameter name="Field" value="DEV_REG_ID"/>
+        <parameter name="Type" value="MEDIUMTEXT"/>
+        <parameter name="Null" value="NO"/>
+        <parameter name="Key" value=""/>
+        <parameter name="Default" value=""/>
+        <parameter name="Extra" value=""/>
+      </vendor>
+    </column>
     <column name="DEV_TYPE"         type="VARCHAR" size="50"  required="true"  default=""/>
     <column name="DEV_CREATE"       type="TIMESTAMP"          required="true"  />
     <column name="DEV_UPDATE"       type="TIMESTAMP"          required="true"  />
diff --git a/workflow/engine/data/mysql/schema.sql b/workflow/engine/data/mysql/schema.sql
index 7a4bfe380..6a6b4a9e5 100644
--- a/workflow/engine/data/mysql/schema.sql
+++ b/workflow/engine/data/mysql/schema.sql
@@ -3077,7 +3077,7 @@ CREATE TABLE `NOTIFICATION_DEVICE`
 	`DEV_UID` VARCHAR(32) default '' NOT NULL,
 	`USR_UID` VARCHAR(32) default '' NOT NULL,
 	`SYS_LANG` VARCHAR(10) default '',
-	`DEV_REG_ID` VARCHAR(150) default '' NOT NULL,
+	`DEV_REG_ID` MEDIUMTEXT default '' NOT NULL,
 	`DEV_TYPE` VARCHAR(50) default '' NOT NULL,
 	`DEV_CREATE` DATETIME  NOT NULL,
 	`DEV_UPDATE` DATETIME  NOT NULL,