diff --git a/src/Symfony/Component/Filesystem/Filesystem.php b/src/Symfony/Component/Filesystem/Filesystem.php
index fafd3649251da..98725e9149931 100644
--- a/src/Symfony/Component/Filesystem/Filesystem.php
+++ b/src/Symfony/Component/Filesystem/Filesystem.php
@@ -170,7 +170,7 @@ private static function doRemove(array $files, bool $isRecursive): void
                 }
             } elseif (is_dir($file)) {
                 if (!$isRecursive) {
-                    $tmpName = \dirname(realpath($file)).'/.'.strrev(strtr(base64_encode(random_bytes(2)), '/=', '-.'));
+                    $tmpName = \dirname(realpath($file)).'/.'.strrev(strtr(base64_encode(random_bytes(2)), '/=', '-_'));
 
                     if (file_exists($tmpName)) {
                         try {