diff --git a/roles/upload-logs-gcs/library/zuul_google_storage_upload.py b/roles/upload-logs-gcs/library/zuul_google_storage_upload.py
index 774a786df..b0c5eef7d 100755
--- a/roles/upload-logs-gcs/library/zuul_google_storage_upload.py
+++ b/roles/upload-logs-gcs/library/zuul_google_storage_upload.py
@@ -260,6 +260,7 @@ def sizeof_fmt(num, suffix='B'):
 
 class Credentials(gce_cred.Credentials):
     def __init__(self, path):
+        super().__init__()
         self._path = path
         self.refresh(None)