diff --git a/journal.py b/journal.py
index 82cc639012..61689d0471 100644
--- a/journal.py
+++ b/journal.py
@@ -135,8 +135,8 @@ class Journal(ModelSQL, ModelView, CompanyMultiValueMixin):
     def default_active():
         return True
 
-    @staticmethod
-    def default_sequence():
+    @classmethod
+    def default_sequence(cls, **pattern):
         return None
 
     @staticmethod