diff --git a/src/scriptform.py b/src/scriptform.py
index 98cf3ff..843d325 100755
--- a/src/scriptform.py
+++ b/src/scriptform.py
@@ -142,7 +142,8 @@ class ScriptForm(object):
         # We need to spawn a new thread in which the server is shut down,
         # because doing it from the main thread blocks, since the server is
         # waiting for connections..
-        threading.Thread(target=t_shutdown, args=(1,))
+        thread = threading.Thread(target=t_shutdown, args=(self,))
+        thread.start()
 
 
 def main():  # pragma: no cover