diff --git a/odoo/addons/base/models/res_currency.py b/odoo/addons/base/models/res_currency.py
index be2f50b7fb5..7eddd52972e 100644
--- a/odoo/addons/base/models/res_currency.py
+++ b/odoo/addons/base/models/res_currency.py
@@ -46,6 +46,8 @@ class Currency(models.Model):
     ]
 
     def _get_rates(self, company, date):
+        if not self.ids:
+            return {}
         self.env['res.currency.rate'].flush(['rate', 'currency_id', 'company_id', 'name'])
         query = """SELECT c.id,
                           COALESCE((SELECT r.rate FROM res_currency_rate r