diff --git a/build/terraform/aws/kinesis_data_stream/main.tf b/build/terraform/aws/kinesis_data_stream/main.tf
index f47f6f67..000f5382 100644
--- a/build/terraform/aws/kinesis_data_stream/main.tf
+++ b/build/terraform/aws/kinesis_data_stream/main.tf
@@ -1,14 +1,3 @@
-locals {
-  # These are managed by the Autoscale application.
-  # https://github.com/brexhq/substation/blob/main/internal/aws/cloudwatch/cloudwatch.go
-  cw_alarm_ignore_changes = [
-    "datapoints_to_alarm",
-    "evaluation_periods",
-    "threshold",
-    "metric_query",
-  ]
-}
-
 resource "random_uuid" "id" {}
 
 resource "aws_kinesis_stream" "stream" {
@@ -103,7 +92,9 @@ resource "aws_cloudwatch_metric_alarm" "metric_alarm_downscale" {
   treat_missing_data  = "ignore"
 
   lifecycle {
-    ignore_changes = local.cw_alarm_ignore_changes
+    # These are managed by the Autoscale application.
+    # https://github.com/brexhq/substation/blob/main/internal/aws/cloudwatch/cloudwatch.go
+    ignore_changes = [metric_query, datapoints_to_alarm, evaluation_periods, threshold]
   }
 
   metric_query {
@@ -188,7 +179,9 @@ resource "aws_cloudwatch_metric_alarm" "metric_alarm_upscale" {
   treat_missing_data  = "ignore"
 
   lifecycle {
-    ignore_changes = local.cw_alarm_ignore_changes
+    # These are managed by the Autoscale application.
+    # https://github.com/brexhq/substation/blob/main/internal/aws/cloudwatch/cloudwatch.go
+    ignore_changes = [metric_query, datapoints_to_alarm, evaluation_periods, threshold]
   }
 
   metric_query {