diff --git a/account.py b/account.py
index 07ba63a2a5..80d9443b34 100644
--- a/account.py
+++ b/account.py
@@ -495,7 +495,7 @@ class AnalyticAccountEntry(ModelView, ModelSQL):
             yield analytic_line
 
 
-class AnalyticMixin(ModelSQL):
+class AnalyticMixin(object):
 
     analytic_accounts = fields.One2Many('analytic.account.entry', 'origin',
         'Analytic Accounts',