diff --git a/lib/common.php b/lib/common.php
index 88f398cbab..14fb2093fa 100644
--- a/lib/common.php
+++ b/lib/common.php
@@ -60,6 +60,8 @@ $config =
 			  'params' => NULL),
 		'nickname' =>
 		array('blacklist' => array()),
+		'avatar' =>
+		array('server' => NULL),
 		'xmpp' =>
 		array('enabled' => false,
 			  'server' => 'INVALID SERVER',