1 files changed, 1 insertions, 1 deletions
diff --git a/synapse/_scripts/generate_config.py b/synapse/_scripts/generate_config.py
index 75fce20b12..08eb8ef114 100755
--- a/synapse/_scripts/generate_config.py
+++ b/synapse/_scripts/generate_config.py
@@ -7,7 +7,7 @@ import sys
 from synapse.config.homeserver import HomeServerConfig
 
 
-def main():
+def main() -> None:
     parser = argparse.ArgumentParser()
     parser.add_argument(
         "--config-dir",