diff --git a/orchestra/contrib/orders/helpers.py b/orchestra/contrib/orders/helpers.py
index 7f08864b..b5e1487a 100644
--- a/orchestra/contrib/orders/helpers.py
+++ b/orchestra/contrib/orders/helpers.py
@@ -12,7 +12,7 @@ def get_related_object(origin, max_depth=2):
             a use-case calls for it.
     """
     def related_iterator(node):
-        for field in node._meta.virtual_fields:
+        for field in node._meta.private_fields:
             if hasattr(field, 'ct_field'):
                 yield getattr(node, field.name)
         for field in node._meta.fields:
diff --git a/orchestra/contrib/resources/models.py b/orchestra/contrib/resources/models.py
index 9ebd92b9..143d0496 100644
--- a/orchestra/contrib/resources/models.py
+++ b/orchestra/contrib/resources/models.py
@@ -341,8 +341,8 @@ def create_resource_relation():
         except AttributeError:
             pass
         else:
-            related._meta.virtual_fields = [
-                field for field in related._meta.virtual_fields if field.rel.to != ResourceData
+            related._meta.private_fields = [
+                field for field in related._meta.private_fields if field.rel.to != ResourceData
             ]
     
     for ct, resources in Resource.objects.group_by('content_type').items():