diff --git a/hgext/blackbox.py b/hgext/blackbox.py
--- a/hgext/blackbox.py
+++ b/hgext/blackbox.py
@@ -71,7 +71,7 @@ configitem('blackbox', 'logsource',
     default=False,
 )
 configitem('blackbox', 'track',
-    default=['*'],
+    default=lambda: ['*'],
 )
 
 lastui = None