diff --git a/xdmod/image.pkr.hcl b/xdmod/image.pkr.hcl
index af5abf85530c28adbb99bce7118e5e0367ec65f9..0b343b2b8ab0f9a61125e44897f64254b831f030 100644
--- a/xdmod/image.pkr.hcl
+++ b/xdmod/image.pkr.hcl
@@ -42,7 +42,8 @@ build {
         "lts_secret_key=${var.lts_secret_key}",
         "s3_endpoint=${var.s3_endpoint}",
         "s3_shibboleth_bucket_name=${var.s3_shibboleth_bucket_name}",
-        "s3_shibboleth_object_name=${var.s3_shibboleth_object_name}"
+        "s3_shibboleth_object_name=${var.s3_shibboleth_object_name}",
+        "s3_cert_object_name=${var.s3_cert_object_name}"
     ]
     inline = [
         "sudo -E echo 's3_endpoint: $s3_endpoint'",
diff --git a/xdmod/variables.pkr.hcl b/xdmod/variables.pkr.hcl
index 0afd9f0bb380d88cefbae1dbec5bd515736cfcd1..4a7fc75cadf6b7fe8ec68088648b4220b59d00a3 100644
--- a/xdmod/variables.pkr.hcl
+++ b/xdmod/variables.pkr.hcl
@@ -69,4 +69,9 @@ variable "s3_shibboleth_object_name" {
   type        = string
   default     = ""
   description = "s3 shibboleth object name"
+}
+variable "s3_cert_object_name" {
+  type        = string
+  default     = ""
+  description = "s3 certificate object name"
 }
\ No newline at end of file