diff --git a/zulip/zulip/api_examples.py b/zulip/zulip/api_examples.py
index b755c29..d5c9d1a 100644
--- a/zulip/zulip/api_examples.py
+++ b/zulip/zulip/api_examples.py
@@ -5,6 +5,7 @@ import zulip
 import argparse
 
 def main():
+    # type: () -> None
     usage = """zulip-api-examples [script_name]
 
 Prints the path to the Zulip API example scripts."""