diff --git a/addons/survey/models/survey_survey.py b/addons/survey/models/survey_survey.py
index 33dcb38d1fa..f12a34ad5fe 100644
--- a/addons/survey/models/survey_survey.py
+++ b/addons/survey/models/survey_survey.py
@@ -471,7 +471,7 @@ class Survey(models.Model):
     def action_start_survey(self, answer=None):
         """ Open the website page with the survey form """
         self.ensure_one()
-        url = '%s?%s' % (self.get_start_url(), werkzeug.urls.url_encode({'answer_token': answer.access_token or None}))
+        url = '%s?%s' % (self.get_start_url(), werkzeug.urls.url_encode({'answer_token': answer and answer.access_token or None}))
         return {
             'type': 'ir.actions.act_url',
             'name': "Start Survey",
@@ -482,7 +482,7 @@ class Survey(models.Model):
     def action_print_survey(self, answer=None):
         """ Open the website page with the survey printable view """
         self.ensure_one()
-        url = '%s?%s' % (self.get_print_url(), werkzeug.urls.url_encode({'answer_token': answer.access_token or None}))
+        url = '%s?%s' % (self.get_print_url(), werkzeug.urls.url_encode({'answer_token': answer and answer.access_token or None}))
         return {
             'type': 'ir.actions.act_url',
             'name': "Print Survey",