diff --git a/README.yaml b/README.yaml
index 50aacde..47be9ba 100644
--- a/README.yaml
+++ b/README.yaml
@@ -75,6 +75,7 @@ usage: |-
         actions_enabled           = true
         insufficient_data_actions = []
         ok_actions                = []
+        treat_missing_data        = "ignore"
         dimensions = {
           instance_id = module.ec2.instance_id[0]
         }
diff --git a/main.tf b/main.tf
index 42313da..252cd66 100644
--- a/main.tf
+++ b/main.tf
@@ -32,6 +32,7 @@ resource "aws_cloudwatch_metric_alarm" "default" {
   actions_enabled           = var.actions_enabled
   insufficient_data_actions = var.insufficient_data_actions
   ok_actions                = var.ok_actions
+  treat_missing_data        = var.treat_missing_data
   tags                      = module.labels.tags
 
   dimensions = var.dimensions
@@ -52,6 +53,7 @@ resource "aws_cloudwatch_metric_alarm" "expression" {
   actions_enabled           = var.actions_enabled
   insufficient_data_actions = var.insufficient_data_actions
   ok_actions                = var.ok_actions
+  treat_missing_data        = var.treat_missing_data
   tags                      = module.labels.tags
   dynamic "metric_query" {
     for_each = var.query_expressions
@@ -97,6 +99,7 @@ resource "aws_cloudwatch_metric_alarm" "anomaly" {
   actions_enabled           = var.actions_enabled
   insufficient_data_actions = var.insufficient_data_actions
   ok_actions                = var.ok_actions
+  treat_missing_data        = var.treat_missing_data
   tags                      = module.labels.tags
   dynamic "metric_query" {
     for_each = var.query_expressions
diff --git a/variables.tf b/variables.tf
index d4aa742..7587b66 100644
--- a/variables.tf
+++ b/variables.tf
@@ -127,6 +127,12 @@ variable "insufficient_data_actions" {
   description = "The list of actions to execute when this alarm transitions into an INSUFFICIENT_DATA state from any other state."
 }
 
+variable "treat_missing_data" {
+  type        = string
+  default     = "missing"
+  description = "Sets how an alarm is going to handle missing data points."
+}
+
 variable "ok_actions" {
   type        = list(any)
   default     = []