diff --git a/opportunity.py b/opportunity.py
index 81c98d87b0..600c23275f 100644
--- a/opportunity.py
+++ b/opportunity.py
@@ -586,6 +586,7 @@ class SaleOpportunityHistory(ModelSQL, ModelView):
                         *time.strptime(values['date'],
                             '%Y-%m-%d %H:%M:%S.%f')[:6])
                 values['date'] = values['date'].replace(microsecond=0)
+                values['date'] += datetime.timedelta(seconds=1)
         return res