diff --git a/plinth/modules/cockpit/__init__.py b/plinth/modules/cockpit/__init__.py
index 4efd156e8..3d07aac20 100644
--- a/plinth/modules/cockpit/__init__.py
+++ b/plinth/modules/cockpit/__init__.py
@@ -101,6 +101,9 @@ class CockpitApp(app_module.App):
                                        **manifest.backup)
         self.add(backup_restore)
 
+    @staticmethod
+    def post_init():
+        """Perform post initialization operations."""
         domain_added.connect(on_domain_added)
         domain_removed.connect(on_domain_removed)