diff --git a/addons/survey/survey.py b/addons/survey/survey.py
index 71308add4df..a1ea9416991 100644
--- a/addons/survey/survey.py
+++ b/addons/survey/survey.py
@@ -698,7 +698,7 @@ class survey_user_input(osv.Model):
     def _quizz_get_score(self, cr, uid, ids, name, args, context=None):
         ret = dict()
         for user_input in self.browse(cr, uid, ids, context=context):
-            ret[user_input.id] = sum([uil.quizz_mark for uil in user_input.user_input_line_ids] or 0.0)
+            ret[user_input.id] = sum([uil.quizz_mark for uil in user_input.user_input_line_ids] or [0.0])
         return ret
 
     _columns = {
@@ -743,6 +743,7 @@ class survey_user_input(osv.Model):
         'type': 'manually',
         'state': 'new',
         'token': lambda s, cr, uid, c: uuid.uuid4().__str__(),
+        'quizz_score': 0.0,
     }
 
     _sql_constraints = [