diff --git a/ansible/roles/horizon/defaults/main.yml b/ansible/roles/horizon/defaults/main.yml
index 4577eb8e99..babe266dfe 100644
--- a/ansible/roles/horizon/defaults/main.yml
+++ b/ansible/roles/horizon/defaults/main.yml
@@ -90,7 +90,7 @@ horizon_dimensions: "{{ default_container_dimensions }}"
 # OpenStack
 ####################
 horizon_logging_debug: "{{ openstack_logging_debug }}"
-horizon_keystone_url: "{{ keystone_internal_url }}"
+horizon_keystone_url: "{{ keystone_internal_url }}/v3"
 
 
 ####################