diff --git a/google_psc_to_elastic/main.tf b/google_psc_to_elastic/main.tf
index 07a23db4..1abd6e77 100644
--- a/google_psc_to_elastic/main.tf
+++ b/google_psc_to_elastic/main.tf
@@ -3,13 +3,16 @@ locals {
   name     = "${var.name}-${var.gcp_region}-psc-elastic-endpoint"
 }
 
+data "google_project" "project" {
+}
+
 data "ec_gcp_private_service_connect_endpoint" "default" {
   region = var.gcp_region
 }
 
 data "google_compute_network" "default" {
   name    = var.network_name
-  project = try(var.project_id_for_network, null)
+  project = var.project_id_for_network != "" ? var.project_id_for_network : data.google_project.project.project_id
 }
 
 data "google_compute_subnetwork" "default" {
diff --git a/google_psc_to_elastic/variables.tf b/google_psc_to_elastic/variables.tf
index fb6b0de8..48355db4 100644
--- a/google_psc_to_elastic/variables.tf
+++ b/google_psc_to_elastic/variables.tf
@@ -15,7 +15,8 @@ variable "network_name" {
 
 variable "project_id_for_network" {
   description = "The project ID of the network"
-  type        = optional(string)
+  type        = string
+  default     = ""
 }
 
 variable "subnetwork_name" {