1 files changed, 2 insertions, 0 deletions

diff --git a/src/mailman/config/config.py b/src/mailman/config/config.py
index e8c8ebc8b..287de9798 100644
--- a/src/mailman/config/config.py
+++ b/src/mailman/config/config.py
@@ -87,6 +87,7 @@ class Configuration:
         self.pipelines = {}
         self.commands = {}
         self.password_context = None
+        self.initialized = False
 
     def _clear(self):
         """Clear the cached configuration variables."""
@@ -136,6 +137,7 @@ class Configuration:
         # Expand and set up all directories.
         self._expand_paths()
         self.ensure_directories_exist()
+        self.initialized = True
         notify(ConfigurationUpdatedEvent(self))
 
     def _expand_paths(self):