diff --git a/core/includes/bootstrap.inc b/core/includes/bootstrap.inc
index fa6bbfc..c612839 100644
--- a/core/includes/bootstrap.inc
+++ b/core/includes/bootstrap.inc
@@ -446,7 +446,7 @@ function config_get_config_directory($type = CONFIG_ACTIVE_DIRECTORY) {
  *   Drupal\Core\Bootstrap\Bootstrap::overrideServerVariables() directly instead.
  */
 function drupal_override_server_variables($variables = array()) {
-  Bootstrap::overrideServerVariables(\Drupal::request, $variables);
+  Bootstrap::overrideServerVariables(\Drupal::request(), $variables);
 }
 
 /**