diff --git a/src/aleph/vm/controllers/__main__.py b/src/aleph/vm/controllers/__main__.py
index 62639ee8..3232c82b 100644
--- a/src/aleph/vm/controllers/__main__.py
+++ b/src/aleph/vm/controllers/__main__.py
@@ -86,6 +86,7 @@ async def handle_persistent_vm(config: Configuration, execution: Union[MicroVM,
     def callback():
         """Callback for the signal handler to stop the VM and cleanup properly on SIGTERM."""
         loop.create_task(execution.teardown())
+
     loop.add_signal_handler(signal.SIGTERM, callback)
 
     await process.wait()