diff --git a/terraform/modules/iam/variable.tf b/terraform/modules/iam/variable.tf
index e69de29..2abd0ed 100644
--- a/terraform/modules/iam/variable.tf
+++ b/terraform/modules/iam/variable.tf
@@ -0,0 +1,4 @@
+variable "project_id" {
+  description = "project id"
+  type        = string
+}
\ No newline at end of file