diff --git a/phpBB/memberlist.php b/phpBB/memberlist.php
index 80917a7f76..4f4dcb1b41 100644
--- a/phpBB/memberlist.php
+++ b/phpBB/memberlist.php
@@ -829,8 +829,14 @@ switch ($mode)
 		$pagination = $phpbb_container->get('pagination');
 
 		// Sorting
-		$sort_key_text = array('a' => $user->lang['SORT_USERNAME'], 'c' => $user->lang['SORT_JOINED'], 'd' => $user->lang['SORT_POST_COUNT'], 'k' => $user->lang['JABBER']);
-		$sort_key_sql = array('a' => 'u.username_clean', 'c' => 'u.user_regdate', 'd' => 'u.user_posts',  'k' => 'u.user_jabber');
+		$sort_key_text = array('a' => $user->lang['SORT_USERNAME'], 'c' => $user->lang['SORT_JOINED'], 'd' => $user->lang['SORT_POST_COUNT']);
+		$sort_key_sql = array('a' => 'u.username_clean', 'c' => 'u.user_regdate', 'd' => 'u.user_posts');
+
+		if ($config['jab_enable'])
+		{
+			$sort_key_text['k'] = $user->lang['JABBER'];
+			$sort_key_sql['k'] = 'u.user_jabber';
+		}
 
 		if ($auth->acl_get('a_user'))
 		{