diff --git a/aws-ecs-job-fargate/iam.tf b/aws-ecs-job-fargate/iam.tf
index dee73ba6..c8d13636 100644
--- a/aws-ecs-job-fargate/iam.tf
+++ b/aws-ecs-job-fargate/iam.tf
@@ -43,7 +43,7 @@ resource "aws_iam_role_policy" "task_execution_role_secretsmanager" {
 }
 
 data "aws_iam_policy_document" "ssm_permission" {
-  count = var.ssm_arn != null ? 1 : 0
+  count = var.ssm_parameter_store_arns != null ? 1 : 0
 
   statement {
     actions = [