diff --git a/variables.tf b/variables.tf
index d978adf..a9a0475 100644
--- a/variables.tf
+++ b/variables.tf
@@ -120,6 +120,5 @@ variable "kms_alias_name" {
 
 variable "ami_id" {
   description = "ID of the AMI to be used for the Consul and Vault instances."
-  default     = null
   type        = string
 }