diff --git a/metadata/service/aggregator/single.yml b/metadata/service/aggregator/single.yml
index 7e814c5..476536c 100644
--- a/metadata/service/aggregator/single.yml
+++ b/metadata/service/aggregator/single.yml
@@ -5,8 +5,10 @@
 parameters:
   _param:
     aggregator_poolsize: 100
+    nagios_host_dimension_key: nagios_host
   heka:
     aggregator:
       enabled: true
       influxdb_time_precision: ms
       poolsize: ${_param:aggregator_poolsize}
+      nagios_host_dimension_key: ${_param:nagios_host_dimension_key}