diff --git a/lib/nntp/tiny/daemon.py b/lib/nntp/tiny/daemon.py
index 72b7c07..bc262ac 100644
--- a/lib/nntp/tiny/daemon.py
+++ b/lib/nntp/tiny/daemon.py
@@ -23,4 +23,8 @@ class Daemon():
         with open(pidfile, 'w') as fh:
             print(str(os.getpid()), file=fh)
 
-        signal.signal(signal.SIGTERM, lambda s, f: os.unlink(pidfile))
+        def stop(sig, trace):
+            os.unlink(pidfile)
+            exit(0)
+
+        signal.signal(signal.SIGTERM, stop)