diff --git a/make_help_scripts/create_reviewer_stats.py b/make_help_scripts/create_reviewer_stats.py
index 2b9cb036595..fe19fdf9465 100644
--- a/make_help_scripts/create_reviewer_stats.py
+++ b/make_help_scripts/create_reviewer_stats.py
@@ -1,4 +1,5 @@
 import requests
+import os
 from datetime import datetime, timedelta
 
 def get_reviewers_stats(owner, repos, branches, earliest_date="0000-00-00T00:00:00Z"):