diff --git a/ansible/roles/keystone/templates/wsgi-keystone.conf.j2 b/ansible/roles/keystone/templates/wsgi-keystone.conf.j2
index 83886415b0..6c6e96450c 100644
--- a/ansible/roles/keystone/templates/wsgi-keystone.conf.j2
+++ b/ansible/roles/keystone/templates/wsgi-keystone.conf.j2
@@ -78,6 +78,7 @@ LogLevel info
 {% for idp in keystone_identity_providers %}
 {% if idp.protocol == 'openid' %}
     <LocationMatch /v3/auth/OS-FEDERATION/identity_providers/{{ idp.name }}/protocols/{{ idp.protocol }}/websso>
+      OIDCDiscoverURL {{ keystone_public_url }}/redirect_uri?iss={{ item.identifier | urlencode }}
       Require valid-user
       AuthType openid-connect
     </LocationMatch>