diff --git server/pifr_server.admin.inc server/pifr_server.admin.inc
index db0b531..c341e30 100644
--- server/pifr_server.admin.inc
+++ server/pifr_server.admin.inc
@@ -146,4 +146,11 @@ function pifr_server_admin_configuration_form(&$form, $form_state) {
     '#default_value' => PIFR_SERVER_CLIENT_TEST_INTERVAL
   );
   $form['server']['pifr_server_client_test_interval']['#options'][-1] = t('Never');
+
+  $form['server']['pifr_drupal_repository'] = array(
+    '#type' => 'textfield',
+    '#title' => t('Drupal core repository URL'),
+    '#default_value' => variable_get('pifr_drupal_repository', 'git://git.drupal.org/project/drupal.git'),
+    '#required' => TRUE,
+  );
 }