diff --git a/infolog/inc/class.infolog_bo.inc.php b/infolog/inc/class.infolog_bo.inc.php
index d6d40c24d1..42b5b3d4b6 100644
--- a/infolog/inc/class.infolog_bo.inc.php
+++ b/infolog/inc/class.infolog_bo.inc.php
@@ -70,7 +70,13 @@ class infolog_bo
 	 *
 	 * @var array
 	 */
-	var $sub_excludefields = array('info_des','info_id', 'info_uid', 'info_etag', 'caldav_name', 'info_created', 'info_creator', 'info_datemodified', 'info_modifier');
+	var $sub_excludefields = array('info_id', 'info_uid', 'info_etag', 'caldav_name', 'info_created', 'info_creator', 'info_datemodified', 'info_modifier');
+	/**
+	 * Additional fields to $sub_excludefields to exclude, if no config stored
+	 *
+	 * @var array
+	 */
+	var $default_sub_excludefields = array('info_des');
 	/**
 	 * implicit ACL rights of the responsible user: read or edit
 	 *
@@ -244,9 +250,12 @@ class infolog_bo
 			}
 			if (is_array($config_data['sub_excludefields']) && $config_data['sub_excludefields'])
 			{
-				if (($k = array_search('info_des',$this->sub_excludefields))) unset($this->sub_excludefields[$k]);
 				$this->sub_excludefields = array_merge($this->sub_excludefields,$config_data['sub_excludefields']);
 			}
+			else
+			{
+				$this->sub_excludefields = array_merge($this->sub_excludefields,$this->default_sub_excludefields);
+			}
 			if ($config_data['implicit_rights'] == 'edit')
 			{
 				$this->implicit_rights = 'edit';
diff --git a/infolog/inc/class.infolog_ui.inc.php b/infolog/inc/class.infolog_ui.inc.php
index daa319a07d..78e3405e85 100644
--- a/infolog/inc/class.infolog_ui.inc.php
+++ b/infolog/inc/class.infolog_ui.inc.php
@@ -2172,15 +2172,17 @@ class infolog_ui
 			foreach(array('copy_excludefields','sub_excludefields') as $name)
 			{
 				$efs = array_keys($name == 'sub_excludefields' ? $sub_excludefields : $excludefields);
-				$this->bo->$name = array_diff($this->bo->$name, $efs);	// restore default from bo
+				$this->bo->$name = array_unique(array_diff($this->bo->$name, $efs, 	// restore default from bo
+					$name == 'sub_excludefields' ? $this->bo->default_sub_excludefields : array()));
+
 				if ($_POST[$name])
 				{
-					if ($name == 'sub_excludefields')	// remove default info_des, to be able to unselect it!
-					{
-						$this->bo->sub_excludefields = array_diff($this->bo->sub_excludefields,array('info_des'));
-					}
 					$this->bo->$name = array_merge($this->bo->$name, array_intersect((array)$_POST[$name], $efs));
 				}
+				elseif ($name == 'sub_excludefields' && !in_array('explicit-set',$this->bo->sub_excludefields))
+				{
+					$this->bo->sub_excludefields[] = 'explicit-set';	// otherwise we can NOT unset default info_des
+				}
 			}
 			config::save_value('copy_excludefields',$this->bo->copy_excludefields,'infolog');
 			config::save_value('sub_excludefields',$this->bo->sub_excludefields,'infolog');