diff --git a/classes/Invitation.php b/classes/Invitation.php
index 0e87c1629c..83625b3932 100644
--- a/classes/Invitation.php
+++ b/classes/Invitation.php
@@ -14,6 +14,7 @@ class Invitation extends Memcached_DataObject
     public $user_id;                         // int(4)   not_null
     public $address;                         // varchar(255)  multiple_key not_null
     public $address_type;                    // varchar(8)  multiple_key not_null
+    public $registered_user_id;              // int(4)   not_null
     public $created;                         // datetime()   not_null
 
     /* Static get */
diff --git a/classes/statusnet.ini b/classes/statusnet.ini
index bdf96c1ddc..017c4dd58e 100644
--- a/classes/statusnet.ini
+++ b/classes/statusnet.ini
@@ -258,6 +258,7 @@ user_id = 129
 address = 130
 address_type = 130
 created = 142
+registered_user_id = 129
 
 [invitation__keys]
 code = K
diff --git a/db/core.php b/db/core.php
index 10d8e51b9b..f8e4af9843 100644
--- a/db/core.php
+++ b/db/core.php
@@ -542,14 +542,17 @@ $schema['invitation'] = array(
         'address' => array('type' => 'varchar', 'length' => 255, 'not null' => true, 'description' => 'invitation sent to'),
         'address_type' => array('type' => 'varchar', 'length' => 8, 'not null' => true, 'description' => 'address type ("email", "xmpp", "sms")'),
         'created' => array('type' => 'datetime', 'not null' => true, 'description' => 'date this record was created'),
+        'registered_user_id' => array('type' => 'int', 'not null' => true, 'description' => 'if the invitation is converted, who the new user is'),
     ),
     'primary key' => array('code'),
     'foreign keys' => array(
         'invitation_user_id_fkey' => array('user', array('user_id' => 'id')),
+        'invitation_registered_user_id_fkey' => array('user', array('registered_user_id' => 'id')),
     ),
     'indexes' => array(
         'invitation_address_idx' => array('address', 'address_type'),
         'invitation_user_id_idx' => array('user_id'),
+        'invitation_registered_user_id_idx' => array('registered_user_id'),
     ),
 );