diff --git a/src/Symfony/Component/Finder/Finder.php b/src/Symfony/Component/Finder/Finder.php
index 2270b36226..0501629701 100644
--- a/src/Symfony/Component/Finder/Finder.php
+++ b/src/Symfony/Component/Finder/Finder.php
@@ -732,12 +732,20 @@ class Finder implements \IteratorAggregate, \Countable
     /**
      * Normalizes given directory names by removing trailing slashes.
      *
+     * Excluding: (s)ftp:// wrapper
+     *
      * @param string $dir
      *
      * @return string
      */
     private function normalizeDir($dir)
     {
-        return rtrim($dir, '/'.\DIRECTORY_SEPARATOR);
+        $dir = rtrim($dir, '/'.\DIRECTORY_SEPARATOR);
+
+        if (preg_match('#^s?ftp://#', $dir)) {
+            $dir .= '/';
+        }
+
+        return $dir;
     }
 }