diff --git a/morituri/program/cdrdao.py b/morituri/program/cdrdao.py
index c83b827..a544f2d 100644
--- a/morituri/program/cdrdao.py
+++ b/morituri/program/cdrdao.py
@@ -308,6 +308,7 @@ class DiscInfoTask(CDRDAOTask):
 
     description = "Scanning disc..."
     table = None
+    sessions = None
 
     def __init__(self, device=None):
         """