diff --git a/platform/drupal/install_6.inc b/platform/drupal/install_6.inc
index a809cb9..4367b26 100644
--- a/platform/drupal/install_6.inc
+++ b/platform/drupal/install_6.inc
@@ -57,6 +57,7 @@ function install_verify_settings() {
 }
 
 function install_create_admin_user($client_email = NULL) {
+  global $client_email;
   if (!$client_email) {
     $client_email = 'webmaster@localhost';
   }