diff --git a/pillar/__init__.py b/pillar/__init__.py
index fc24a1ae..76f7c872 100644
--- a/pillar/__init__.py
+++ b/pillar/__init__.py
@@ -76,6 +76,7 @@ class PillarServer(Eve):
             'protected',
             'service', 'badger', 'svner', 'urler',
         }
+        self._user_roles_indexable: typing.Set[str] = {'demo', 'admin', 'subscriber'}
 
         self.app_root = os.path.abspath(app_root)
         self._load_flask_config()
@@ -370,8 +371,16 @@ class PillarServer(Eve):
         """
 
         for extension in self.pillar_extensions.values():
+            indexed_but_not_defined = extension.user_roles_indexable - extension.user_roles
+            if indexed_but_not_defined:
+                raise ValueError('Extension %s has roles %s indexable but not in user_roles',
+                                 extension.name, indexed_but_not_defined)
+
             self._user_roles.update(extension.user_roles)
-        self.log.info('Loaded %i user roles from extensions', len(self._user_roles))
+            self._user_roles_indexable.update(extension.user_roles_indexable)
+
+        self.log.info('Loaded %i user roles from extensions, %i of which are indexable',
+                      len(self._user_roles), len(self._user_roles_indexable))
 
     def register_static_file_endpoint(self, url_prefix, endpoint_name, static_folder):
         from pillar.web.staticfile import PillarStaticFile
@@ -700,3 +709,7 @@ class PillarServer(Eve):
     @property
     def user_roles(self) -> typing.FrozenSet[str]:
         return frozenset(self._user_roles)
+
+    @property
+    def user_roles_indexable(self) -> typing.FrozenSet[str]:
+        return frozenset(self._user_roles_indexable)
diff --git a/pillar/api/utils/algolia.py b/pillar/api/utils/algolia.py
index a8007496..25ccb337 100644
--- a/pillar/api/utils/algolia.py
+++ b/pillar/api/utils/algolia.py
@@ -1,14 +1,13 @@
 import logging
 
 from bson import ObjectId
-from flask import current_app
 
+from pillar import current_app
 from pillar.api.file_storage import generate_link
 from . import skip_when_testing
 
 log = logging.getLogger(__name__)
 
-INDEX_ALLOWED_USER_ROLES = {'admin', 'subscriber', 'demo', 'flamenco-user'}
 INDEX_ALLOWED_NODE_TYPES = {'asset', 'texture', 'group', 'hdri'}
 
 
@@ -24,7 +23,7 @@ def algolia_index_user_save(user):
         return
 
     # Strip unneeded roles
-    index_roles = user_roles.intersection(INDEX_ALLOWED_USER_ROLES)
+    index_roles = user_roles.intersection(current_app.user_roles_indexable)
 
     # Create or update Algolia index for the user
     index_users.save_object({
diff --git a/pillar/extension.py b/pillar/extension.py
index d709fe16..42767102 100644
--- a/pillar/extension.py
+++ b/pillar/extension.py
@@ -34,6 +34,7 @@ class PillarExtension(object, metaclass=abc.ABCMeta):
 
     # Set of user roles used/introduced by this extension.
     user_roles: typing.Set[str] = set()
+    user_roles_indexable: typing.Set[str] = set()
 
     @property
     @abc.abstractmethod