diff --git a/variables.tf b/variables.tf
index ffc9394..ec41901 100644
--- a/variables.tf
+++ b/variables.tf
@@ -85,6 +85,12 @@ variable "public_hostname" {
   default     = "kiali"
 }
 
+variable "certificate_issuer" {
+  description = "The cluster issuer to use to create the grafana SSL certificate."
+  type        = string
+}
+
+
 # helm repo add kiali https://kiali.org/helm-charts
 # helm search repo kiali/kiali-operator
 variable "kiali_operator_version" {