diff --git a/adjutant/config/identity.py b/adjutant/config/identity.py
index a8a9306..dbd4832 100644
--- a/adjutant/config/identity.py
+++ b/adjutant/config/identity.py
@@ -134,4 +134,12 @@ _auth_group.register_child_config(
         required_for_tests=False,
     )
 )
+_auth_group.register_child_config(
+    fields.StrConfig(
+        "interface",
+        help_text="Keystone endpoint interface type.",
+        default="public",
+        required=True,
+    )
+)
 config_group.register_child_config(_auth_group)
diff --git a/adjutant/wsgi.py b/adjutant/wsgi.py
index 90f8c4c..9001e4f 100644
--- a/adjutant/wsgi.py
+++ b/adjutant/wsgi.py
@@ -44,6 +44,7 @@ conf = {
     "project_domain_id": CONF.identity.auth.project_domain_id,
     "user_domain_id": CONF.identity.auth.user_domain_id,
     "auth_url": CONF.identity.auth.auth_url,
+    "interface": CONF.identity.auth.interface,
     "delay_auth_decision": True,
     "include_service_catalog": False,
     "token_cache_time": CONF.identity.token_cache_time,