diff --git a/admin/admin_robots.php b/admin/admin_robots.php
index 012454498..ff9a49a60 100644
--- a/admin/admin_robots.php
+++ b/admin/admin_robots.php
@@ -33,7 +33,7 @@ if (isset($_POST['save'])) {
 }
 
 $current_content = '';
-if (file_exists($robots_file)) {
+if (is_file($robots_file)) {
     $current_content = file_get_contents($robots_file);
 }