diff --git a/modules/billing/cart.php b/modules/billing/cart.php
index fc0ca9e6..f9f0e088 100644
--- a/modules/billing/cart.php
+++ b/modules/billing/cart.php
@@ -3,7 +3,11 @@
  * Shopping Cart - Display unpaid invoices and PayPal checkout
  * Standalone billing module - uses only standard PHP mysqli
  */
-session_start();
+// Start session using the website session name to match the rest of the site
+if (session_status() === PHP_SESSION_NONE) {
+    session_name("gameservers_website");
+    session_start();
+}
 require_once(__DIR__ . '/includes/config.inc.php');
 require_once(__DIR__ . '/includes/login_required.php');
 
diff --git a/modules/billing/docs.php b/modules/billing/docs.php
index eb7582b5..3b24f2c0 100644
--- a/modules/billing/docs.php
+++ b/modules/billing/docs.php
@@ -4,8 +4,11 @@
  * Displays a list of documentation categories and allows viewing individual docs
  */
 
-// Start session for navigation state
-session_start();
+// Start session using the website session name to match the rest of the site
+if (session_status() === PHP_SESSION_NONE) {
+    session_name("gameservers_website");
+    session_start();
+}
 
 // Include config
 require_once(__DIR__ . '/includes/config.inc.php');