diff --git a/plinth/modules/users/__init__.py b/plinth/modules/users/__init__.py
index 3a001d020..f38629149 100644
--- a/plinth/modules/users/__init__.py
+++ b/plinth/modules/users/__init__.py
@@ -57,7 +57,7 @@ def init():
 def setup(helper, old_version=None):
     """Install and configure the module."""
     helper.install(managed_packages)
-    if old_version is None:
+    if not old_version:
         helper.call('post', actions.superuser_run, 'users', ['first-setup'])
     helper.call('post', actions.superuser_run, 'users', ['setup'])