Rename Nginx cluster id to 'nginx'
diff --git a/nginx/meta/heka.yml b/nginx/meta/heka.yml
index 0391812..e2f0fc6 100644
--- a/nginx/meta/heka.yml
+++ b/nginx/meta/heka.yml
@@ -21,7 +21,7 @@
         service: nginx
 aggregator:
   alarm_cluster:
-    nginx_check:
+    nginx:
       policy: availability_of_members
       alerting: enabled_with_notification
       match: