diff --git a/htdocs/knowledgemanagement/class/knowledgerecord.class.php b/htdocs/knowledgemanagement/class/knowledgerecord.class.php
index 6b192c4a83e..79f191ec5bb 100644
--- a/htdocs/knowledgemanagement/class/knowledgerecord.class.php
+++ b/htdocs/knowledgemanagement/class/knowledgerecord.class.php
@@ -101,7 +101,7 @@ class KnowledgeRecord extends CommonObject
 	 */
 	public $fields=array(
 		'rowid' => array('type'=>'integer', 'label'=>'TechnicalID', 'enabled'=>'1', 'position'=>1, 'notnull'=>1, 'visible'=>0, 'noteditable'=>'1', 'index'=>1, 'css'=>'left', 'comment'=>"Id"),
-		'ref' => array('type'=>'varchar(128)', 'label'=>'Ref', 'enabled'=>'1', 'position'=>10, 'notnull'=>1, 'default'=>'(PROV)', 'visible'=>5, 'index'=>1, 'searchall'=>1, 'comment'=>"Reference of object"),
+		'ref' => array('type'=>'varchar(128)', 'label'=>'Ref', 'enabled'=>'1', 'position'=>10, 'notnull'=>1, 'default'=>'(PROV)', 'visible'=>5, 'index'=>1, 'searchall'=>1, 'comment'=>"Reference of object", "showoncombobox"=>1),
 		'question' => array('type'=>'text', 'label'=>'Question', 'enabled'=>'1', 'position'=>30, 'notnull'=>1, 'visible'=>1, 'csslist'=>'tdoverflow300', 'copytoclipboard'=>1),
 		'lang' => array('type'=>'varchar(6)', 'label'=>'Language', 'enabled'=>'1', 'position'=>40, 'notnull'=>0, 'visible'=>1),
 		'answer' => array('type'=>'html', 'label'=>'Solution', 'enabled'=>'1', 'position'=>50, 'notnull'=>0, 'visible'=>3, 'csslist'=>'tdoverflow300', 'copytoclipboard'=>1),