diff --git a/modify_gtfs.py b/modify_gtfs.py
index 906173f..235ca8b 100644
--- a/modify_gtfs.py
+++ b/modify_gtfs.py
@@ -47,7 +47,7 @@ def modify_routes(gtfs_file, routes, output_file=None):
     logging.info(f"Done!")
 
 
-if __name__ == "main":
+if __name__ == "__main__":
     gtfs_file = sys.argv[1]
     routes = sys.argv[2]
     output_file = sys.argv[3]