diff --git a/seahub/role_permissions/settings.py b/seahub/role_permissions/settings.py
index 52221c1286..d62753abba 100644
--- a/seahub/role_permissions/settings.py
+++ b/seahub/role_permissions/settings.py
@@ -3,12 +3,13 @@ from copy import deepcopy
 import logging
 
 from django.conf import settings
-from seahub.constants import DEFAULT_USER, GUEST_USER, DEFAULT_ORG, \
+from seahub.constants import DEFAULT_USER, GUEST_USER, \
         DEFAULT_ADMIN, SYSTEM_ADMIN, DAILY_ADMIN, AUDIT_ADMIN
 
 # Get an instance of a logger
 logger = logging.getLogger(__name__)
 
+
 def merge_roles(default, custom):
     """Merge custom dict into the copy of default dict, and return the copy."""
     copy = deepcopy(default)
@@ -22,6 +23,7 @@ def merge_roles(default, custom):
 
     return copy
 
+
 DEFAULT_ENABLED_ROLE_PERMISSIONS = {
     DEFAULT_USER: {
         'can_add_repo': True,
@@ -122,6 +124,7 @@ try:
 except AttributeError:
     pass  # ignore error if ENABLED_ADMIN_ROLE_PERMISSIONS is not set in settings.py
 
+
 def get_enabled_admin_role_permissions():
     permissions = {}
     for role, perms in admin_role_permissions.items():
@@ -140,4 +143,5 @@ def get_enabled_admin_role_permissions():
 
     return permissions
 
+
 ENABLED_ADMIN_ROLE_PERMISSIONS = get_enabled_admin_role_permissions()
diff --git a/seahub/role_permissions/utils.py b/seahub/role_permissions/utils.py
index c65a6eda01..28da1942fc 100644
--- a/seahub/role_permissions/utils.py
+++ b/seahub/role_permissions/utils.py
@@ -3,15 +3,17 @@ import logging
 
 from .settings import ENABLED_ROLE_PERMISSIONS, ENABLED_ADMIN_ROLE_PERMISSIONS
 
-from seahub.constants import DEFAULT_USER, DEFAULT_ADMIN
+from seahub.constants import DEFAULT_USER, DEFAULT_ADMIN, AUDIT_ADMIN
 
 logger = logging.getLogger(__name__)
 
+
 def get_available_roles():
     """Get available roles defined in `ENABLED_ROLE_PERMISSIONS`.
     """
     return list(ENABLED_ROLE_PERMISSIONS.keys())
 
+
 def get_enabled_role_permissions_by_role(role):
     """Get permissions dict(perm_name: bool) of a role.
     """
@@ -24,11 +26,13 @@ def get_enabled_role_permissions_by_role(role):
 
     return ENABLED_ROLE_PERMISSIONS[role]
 
+
 def get_available_admin_roles():
     """Get available admin roles defined in `ENABLED_ADMIN_ROLE_PERMISSIONS`.
     """
     return list(ENABLED_ADMIN_ROLE_PERMISSIONS.keys())
 
+
 def get_enabled_admin_role_permissions_by_role(role):
     """Get permissions dict(perm_name: bool) of a admin role.
     """
@@ -37,7 +41,7 @@ def get_enabled_admin_role_permissions_by_role(role):
         role = DEFAULT_ADMIN
 
     if role not in list(ENABLED_ADMIN_ROLE_PERMISSIONS.keys()):
-        logger.warn('%s is not a valid admin role, use default admin role.' % role)
-        role = DEFAULT_ADMIN
+        logger.warn('%s is not a valid admin role, use audit admin role.' % role)
+        role = AUDIT_ADMIN
 
     return ENABLED_ADMIN_ROLE_PERMISSIONS[role]