diff --git a/endpoints_management/control/service.py b/endpoints_management/control/service.py
index 127edc6..3edd1ed 100644
--- a/endpoints_management/control/service.py
+++ b/endpoints_management/control/service.py
@@ -183,9 +183,12 @@ def _extract_auth_config(self):
             provider_ids_to_audiences = {}
             for requirement in auth_rule.requirements:
                 provider_id = requirement.providerId
-                if provider_id and requirement.audiences:
-                    audiences = requirement.audiences.split(u",")
-                    provider_ids_to_audiences[provider_id] = audiences
+                if provider_id:
+                    if requirement.audiences:
+                        audiences = requirement.audiences.split(u",")
+                        provider_ids_to_audiences[provider_id] = audiences
+                    else:
+                        provider_ids_to_audiences[provider_id] = None
             auth_infos[selector] = AuthInfo(provider_ids_to_audiences)
         return auth_infos