diff --git a/ckanext/harvest/logic/action/update.py b/ckanext/harvest/logic/action/update.py
index 8c3a170..121c28e 100644
--- a/ckanext/harvest/logic/action/update.py
+++ b/ckanext/harvest/logic/action/update.py
@@ -217,6 +217,7 @@ def harvest_jobs_run(context,data_dict):
 
                     last_object = session.query(HarvestObject) \
                           .filter(HarvestObject.harvest_job_id==job['id']) \
+                          .filter(HarvestObject.import_finished!=None) \
                           .order_by(HarvestObject.import_finished.desc()) \
                           .first()
                     if last_object: