diff --git a/admin-dev/tabs/AdminTranslations.php b/admin-dev/tabs/AdminTranslations.php
index 7bf43a7fd..2155437a5 100644
--- a/admin-dev/tabs/AdminTranslations.php
+++ b/admin-dev/tabs/AdminTranslations.php
@@ -1943,7 +1943,7 @@ class AdminTranslations extends AdminTab
 	{
 		$dir = opendir(_PS_ALL_THEMES_DIR_);
 		while ($folder = readdir($dir))
-			if ($folder != '.' AND $folder != '..' AND file_exists(_PS_ALL_THEMES_DIR_.'/'.$folder.'/preview.jpg'))
+			if ($folder != '.' AND $folder != '..' AND is_dir($folder) AND file_exists(_PS_ALL_THEMES_DIR_.'/'.$folder.'/preview.jpg'))
 				$themes[$folder]['name'] = $folder;
 		closedir($dir);
 		return isset($themes) ? $themes : array();