diff --git a/classes/Notice.php b/classes/Notice.php
index 8300667fa4..ce5243841f 100644
--- a/classes/Notice.php
+++ b/classes/Notice.php
@@ -46,6 +46,7 @@ class Notice extends Memcached_DataObject
     public $reply_to;                        // int(4)
     public $is_local;                        // tinyint(1)
     public $source;                          // varchar(32)
+    public $conversation;                    // int(4)
 
     /* Static get */
     function staticGet($k,$v=NULL) {
diff --git a/classes/laconica.ini b/classes/laconica.ini
index 5fd2cd1f86..aaa7035a44 100755
--- a/classes/laconica.ini
+++ b/classes/laconica.ini
@@ -168,6 +168,7 @@ modified = 384
 reply_to = 1
 is_local = 17
 source = 2
+conversation = 1
 
 [notice__keys]
 id = N