diff --git a/zds/tutorialv2/models/versioned.py b/zds/tutorialv2/models/versioned.py
index 243fe14ef8..0e75ee7975 100644
--- a/zds/tutorialv2/models/versioned.py
+++ b/zds/tutorialv2/models/versioned.py
@@ -923,6 +923,7 @@ class Extract:
     container = None
     position_in_parent = 1
     text = None
+    is_quizz = False
 
     def __init__(self, title, slug="", container=None, position_in_parent=1):
         self.title = title