diff --git a/addons/sale/sales_team.py b/addons/sale/sales_team.py
index ecdecea782f..c4a593cf11d 100644
--- a/addons/sale/sales_team.py
+++ b/addons/sale/sales_team.py
@@ -62,4 +62,4 @@ class crm_team(osv.Model):
     }
 
     def update_invoiced_target(self, cr, uid, id, value, context=None):
-        return self.write(cr, uid, [id], {'invoiced_target': round(float(value))}, context=context)
+        return self.write(cr, uid, [id], {'invoiced_target': round(float(value or 0))}, context=context)