diff --git a/plinth/__main__.py b/plinth/__main__.py
index 54a53f868..08d1ad2d6 100644
--- a/plinth/__main__.py
+++ b/plinth/__main__.py
@@ -299,7 +299,7 @@ def main():
     logger.info('Script prefix - %s', cfg.server_dir)
 
     module_loader.load_modules()
-    if arguments.setup:
+    if arguments.setup is not False:
         run_setup_and_exit(arguments.setup)
 
     if arguments.diagnose: