diff --git a/nginx/server/single.yml b/nginx/server/single.yml
index b77a76f..b35db14 100644
--- a/nginx/server/single.yml
+++ b/nginx/server/single.yml
@@ -1,4 +1,5 @@
 classes:
+- service.keepalived.cluster.single
 - service.nginx.server.single
 - service.nginx.server.stats
 parameters: