diff --git a/src/allmydata/frontends/magic_folder.py b/src/allmydata/frontends/magic_folder.py
index 766f2ae9a..222739150 100644
--- a/src/allmydata/frontends/magic_folder.py
+++ b/src/allmydata/frontends/magic_folder.py
@@ -570,6 +570,7 @@ class Downloader(QueueMixin, WriteFileMixin):
         return d
 
     def stop(self):
+        self._log("stop")
         self._stopped = True
         d = defer.succeed(None)
         d.addCallback(lambda ign: self._lazy_tail)