diff --git a/variables.tf b/variables.tf
index b4117f4..1b7d541 100644
--- a/variables.tf
+++ b/variables.tf
@@ -61,3 +61,8 @@ variable "disk_size" {
   description = "Size of instance disk in Gigabytes"
   default = 10
 }
+
+variable "SSH_PUBLIC_KEY" {
+  description = "SSH Public Key to add to .authorized_keys for the 'ubuntu' user"
+}
+