diff --git a/model/DataObject.php b/model/DataObject.php
index 96877b6bc..ed5a963b4 100644
--- a/model/DataObject.php
+++ b/model/DataObject.php
@@ -3628,10 +3628,10 @@ class DataObject extends ViewableData implements DataObjectInterface, i18nEntity
 					'db'        => (array)Config::inst()->get($ancestorClass, 'db', Config::UNINHERITED)
 				);
 				if($includerelations){
-					$types['has_one'] = (array)singleton($ancestorClass)->uninherited('has_one', true);
-					$types['has_many'] = (array)singleton($ancestorClass)->uninherited('has_many', true);
-					$types['many_many'] = (array)singleton($ancestorClass)->uninherited('many_many', true);
-					$types['belongs_many_many'] = (array)singleton($ancestorClass)->uninherited('belongs_many_many', true);
+					$types['has_one'] = (array)Config::inst()->get($ancestorClass, 'has_one', Config::UNINHERITED);
+					$types['has_many'] = (array)Config::inst()->get($ancestorClass, 'has_many', Config::UNINHERITED);
+					$types['many_many'] = (array)Config::inst()->get($ancestorClass, 'many_many', Config::UNINHERITED);
+					$types['belongs_many_many'] = (array)Config::inst()->get($ancestorClass, 'belongs_many_many', Config::UNINHERITED);
 				}
 				foreach($types as $type => $attrs) {
 					foreach($attrs as $name => $spec) {