diff --git a/htdocs/knowledgemanagement/knowledgerecord_list.php b/htdocs/knowledgemanagement/knowledgerecord_list.php
index 9f4117d5f7b..bd4c8829be5 100644
--- a/htdocs/knowledgemanagement/knowledgerecord_list.php
+++ b/htdocs/knowledgemanagement/knowledgerecord_list.php
@@ -262,7 +262,7 @@ $sql .= $object->getFieldList('t');
 // Add fields from extrafields
 if (!empty($extrafields->attributes[$object->table_element]['label'])) {
 	foreach ($extrafields->attributes[$object->table_element]['label'] as $key => $val) {
-		$sql .= ($extrafields->attributes[$object->table_element]['type'][$key] != 'separate' ? "ef.".$key.' as options_'.$key.', ' : '');
+		$sql .= ($extrafields->attributes[$object->table_element]['type'][$key] != 'separate' ? ",ef.".$key.' as options_'.$key.', ' : '');
 	}
 }
 // Add fields from hooks