diff --git a/sources/application/search/searchform.class.inc.php b/sources/application/search/searchform.class.inc.php
index 538c6bcc5..2c0700def 100644
--- a/sources/application/search/searchform.class.inc.php
+++ b/sources/application/search/searchform.class.inc.php
@@ -329,7 +329,7 @@ class SearchForm
 	 */
 	protected function PopulateFieldList($sClass, $sAlias, &$aZList, &$aOthers)
 	{
-		$aDBIndexes = MetaModel::DBGetIndexes($sClass);
+		$aDBIndexes = self::DBGetIndexes($sClass);
 		$aIndexes = array();
 		foreach($aDBIndexes as $aIndexGroup)
 		{
@@ -381,6 +381,23 @@ class SearchForm
 		});
 	}
 
+	/**
+	 * Search indexes for class and parents
+	 * @param $sClass
+	 *
+	 * @return array
+	 * @throws \CoreException
+	 */
+	protected static function DBGetIndexes($sClass)
+	{
+		$aDBIndexes = MetaModel::DBGetIndexes($sClass);
+		while ($sClass = MetaModel::GetParentClass($sClass))
+		{
+			$aDBIndexes = array_merge($aDBIndexes, MetaModel::DBGetIndexes($sClass));
+		}
+		return $aDBIndexes;
+	}
+
 	protected function IsSubAttribute($oAttDef)
 	{
 		return (($oAttDef instanceof AttributeFriendlyName) || ($oAttDef instanceof AttributeExternalField) || ($oAttDef instanceof AttributeSubItem));