diff --git a/terraform/modules/compute/main.tf b/terraform/modules/compute/main.tf
index 864fca8..96a2a68 100644
--- a/terraform/modules/compute/main.tf
+++ b/terraform/modules/compute/main.tf
@@ -16,6 +16,10 @@ resource "google_compute_instance" "frontend" {
   }
 
   tags = ["frontend", "ssh"]
+
+  metadata = {
+    enable-oslogin = "TRUE"
+  }
 }
 
 resource "google_compute_instance" "backend" {
@@ -35,6 +39,10 @@ resource "google_compute_instance" "backend" {
   }
 
   tags = ["backend", "ssh"]
+
+  metadata = {
+    enable-oslogin = "TRUE"
+  }
 }
 
 resource "google_compute_instance" "database" {
@@ -54,4 +62,8 @@ resource "google_compute_instance" "database" {
   }
 
   tags = ["database", "ssh"]
+
+  metadata = {
+    enable-oslogin = "TRUE"
+  }
 }
diff --git a/terraform/modules/compute/variables.tf b/terraform/modules/compute/variables.tf
index 06f760b..aa736fd 100644
--- a/terraform/modules/compute/variables.tf
+++ b/terraform/modules/compute/variables.tf
@@ -22,6 +22,3 @@ variable "database_subnet_id" {
   type = string
 }
 
-variable "startup_script" {
-  type = string
-}