diff --git a/infrastructure/terragrunt/aws/alarms/locals.tf b/infrastructure/terragrunt/aws/alarms/locals.tf
index 35a54d11a..dafbc7178 100644
--- a/infrastructure/terragrunt/aws/alarms/locals.tf
+++ b/infrastructure/terragrunt/aws/alarms/locals.tf
@@ -22,6 +22,7 @@ locals {
     "HTTP/1.1\\\" 400",
     "HTTP/1.1\\\" 403",
     "HTTP/1.1\\\" 404",
+    "icon_error.gif HTTP/1.1\\\" 200",
     "Undefined constant",
     "value_error.email",
     "/usr/src/wordpress/wp-content/languages",