diff --git a/ckan/logic/schema.py b/ckan/logic/schema.py
index f8fe8df7fbd..44c8c3797bf 100644
--- a/ckan/logic/schema.py
+++ b/ckan/logic/schema.py
@@ -340,6 +340,7 @@ def default_extras_schema():
         'state': [ignore],
         'deleted': [ignore_missing],
         'revision_timestamp': [ignore],
+        '__extras': [ignore],
     }
     return schema