diff --git a/docs/thread_safety.md b/docs/thread_safety.md
index d29ba71..5149729 100644
--- a/docs/thread_safety.md
+++ b/docs/thread_safety.md
@@ -19,7 +19,8 @@
 def build_request(http, *args, **kwargs):
   new_http = google_auth_httplib2.AuthorizedHttp(credentials, http=httplib2.Http())
   return googleapiclient.http.HttpRequest(new_http, *args, **kwargs)
-service = discovery.build('api_name', 'api_version', requestBuilder=build_request)
+authorized_http = google_auth_httplib2.AuthorizedHttp(credentials, http=httplib2.Http())
+service = discovery.build('api_name', 'api_version', requestBuilder=build_request, http=authorized_http)
 
 # Pass in a new Http() manually for every request
 service = discovery.build('api_name', 'api_version')