diff --git a/x-pack/plugins/monitoring/server/lib/alerts/fetch_missing_monitoring_data.ts b/x-pack/plugins/monitoring/server/lib/alerts/fetch_missing_monitoring_data.ts
index 91fc05137a8c18..22db150f1de5e8 100644
--- a/x-pack/plugins/monitoring/server/lib/alerts/fetch_missing_monitoring_data.ts
+++ b/x-pack/plugins/monitoring/server/lib/alerts/fetch_missing_monitoring_data.ts
@@ -101,7 +101,7 @@ export async function fetchMissingMonitoringData(
     'kibana_stats.kibana.name',
     'logstash_stats.logstash.host',
     'beats_stats.beat.name',
-    'beat_stats.beat.type',
+    'beats_stats.beat.type',
   ];
   const subAggs = {
     most_recent: {