diff --git a/show_config_errors.php b/show_config_errors.php
index 9024fec22..7299a4424 100644
--- a/show_config_errors.php
+++ b/show_config_errors.php
@@ -14,6 +14,8 @@ error_reporting(E_ALL);
 /**
  * Read config file.
  */
-require CONFIG_FILE;
+if (is_readable(CONFIG_FILE)) {
+    require CONFIG_FILE;
+}
 
 ?>