diff --git a/swh/lister/debian/lister.py b/swh/lister/debian/lister.py
index 6f5f487..60716a6 100644
--- a/swh/lister/debian/lister.py
+++ b/swh/lister/debian/lister.py
@@ -189,7 +189,7 @@ class DebianLister(ListerHttpTransport, ListerBase):
 
         return self.scheduler.create_tasks(tasks)
 
-    def run(self, distribution, date=None):
+    def run(self, distribution='Debian', date=None):
         """Run the lister for a given (distribution, area) tuple.
 
         Args: