diff --git a/lib/horizon b/lib/horizon
index 02715cedff..5d1df0b0f0 100644
--- a/lib/horizon
+++ b/lib/horizon
@@ -110,7 +110,7 @@ function init_horizon {
     fi
 
     _horizon_config_set $local_settings "" OPENSTACK_HOST \"${KEYSTONE_SERVICE_HOST}\"
-    _horizon_config_set $local_settings "" OPENSTACK_KEYSTONE_URL "\"${KEYSTONE_SERVICE_PROTOCOL}://%s:${KEYSTONE_SERVICE_PORT}/v2.0\" % OPENSTACK_HOST"
+    _horizon_config_set $local_settings "" OPENSTACK_KEYSTONE_URL "\"${KEYSTONE_SERVICE_PROTOCOL}://${KEYSTONE_SERVICE_HOST}:${KEYSTONE_SERVICE_PORT}/v2.0\""
 
     if [ -f $SSL_BUNDLE_FILE ]; then
         _horizon_config_set $local_settings "" OPENSTACK_SSL_CACERT \"${SSL_BUNDLE_FILE}\"