diff --git a/ckan/logic/schema.py b/ckan/logic/schema.py
index 961bb293924..164343a4eac 100644
--- a/ckan/logic/schema.py
+++ b/ckan/logic/schema.py
@@ -187,6 +187,16 @@ def default_group_schema():
         'packages': {
             "id": [not_empty, unicode, package_id_or_name_exists],
             "__extras": [ignore]
+        },
+        'users': {
+            "name": [not_empty, unicode],
+            "capacity": [ignore_missing],
+            "__extras": [ignore]
+        },
+        'groups': {
+            "name": [not_empty, unicode],
+            "capacity": [ignore_missing],
+            "__extras": [ignore]
         }
     }
     return schema