diff --git a/aws/elasticsearch/main.tf b/aws/elasticsearch/main.tf
index 87970c0..632e503 100644
--- a/aws/elasticsearch/main.tf
+++ b/aws/elasticsearch/main.tf
@@ -147,10 +147,10 @@ resource "datadog_monitor" "free_storage" {
   timeout_h           = var.timeout_h
 
   query = <<EOQ
-    max(${var.free_storage_evaluation_window}): ((
+    max(${var.free_storage_evaluation_window}): (
     avg:aws.es.cluster_used_space.average${local.query_filter} by {name,region,aws_account,env} / 
-    avg:aws.es.free_storage_space${local.query_filter} by {name,region,aws_account,env} + 
-    avg:aws.es.cluster_used_space.average${local.query_filter} by {name,region,aws_account,env})) * 100) 
+    ( avg:aws.es.free_storage_space${local.query_filter} by {name,region,aws_account,env} + 
+    avg:aws.es.cluster_used_space.average${local.query_filter} by {name,region,aws_account,env})) * 100 
     > ${var.free_storage_threshold_critical}
 EOQ