diff --git a/variables.tf b/variables.tf
index 2894b1e..d4bdcd4 100644
--- a/variables.tf
+++ b/variables.tf
@@ -67,6 +67,7 @@ variable "configmaps" {
 
 variable "kustomization_patches" {
   type        = string
+  nullable    = true
   description = "kustomization_patches"
 }