diff --git a/patoolib/programs/unadf.py b/patoolib/programs/unadf.py
index 26621b2..e751d60 100644
--- a/patoolib/programs/unadf.py
+++ b/patoolib/programs/unadf.py
@@ -24,6 +24,6 @@ def extract_adf (archive, compression, cmd, **kwargs):
 
 def list_adf (archive, compression, cmd, **kwargs):
     """List an ADF archive."""
-    return [cmd, '-r', archive]
+    return [cmd, '-l', archive]
 
 test_adf = list_adf