diff --git a/observation_portal/observations/models.py b/observation_portal/observations/models.py
index 98c497e1..5550467c 100644
--- a/observation_portal/observations/models.py
+++ b/observation_portal/observations/models.py
@@ -137,6 +137,7 @@ def as_dict(self, no_request=False):
             ret_dict['ipp_value'] = self.request.request_group.ipp_value
             ret_dict['observation_type'] = self.request.request_group.observation_type
             ret_dict['request_group_id'] = self.request.request_group.id
+            ret_dict['created'] = self.created
             ret_dict['modified'] = self.modified
             configuration_status_by_config = {config_status.configuration.id: config_status
                                             for config_status in self.configuration_statuses.all()}