diff --git a/quantum/api/v2/base.py b/quantum/api/v2/base.py
index 0f66755407..0a117a0a28 100644
--- a/quantum/api/v2/base.py
+++ b/quantum/api/v2/base.py
@@ -510,7 +510,7 @@ class Controller(object):
             if context.tenant_id:
                 res_dict['tenant_id'] = context.tenant_id
             else:
-                msg = _("Running without keystyone AuthN requires "
+                msg = _("Running without keystone AuthN requires "
                         " that tenant_id is specified")
                 raise webob.exc.HTTPBadRequest(msg)