diff --git a/lib/files/filesystem.php b/lib/files/filesystem.php
index 1580dfaf63..6f56de9f26 100644
--- a/lib/files/filesystem.php
+++ b/lib/files/filesystem.php
@@ -621,10 +621,11 @@ class Filesystem {
 	 * get the content of a directory
 	 *
 	 * @param string $directory path under datadirectory
+	 * @param string $mimetype_filter limit returned content to this mimetype or mimepart
 	 * @return array
 	 */
-	public static function getDirectoryContent($directory) {
-		return self::$defaultInstance->getDirectoryContent($directory);
+	public static function getDirectoryContent($directory, $mimetype_filter = '') {
+		return self::$defaultInstance->getDirectoryContent($directory, $mimetype_filter);
 	}
 
 	/**
diff --git a/lib/files/view.php b/lib/files/view.php
index e811fb093c..f607bb59aa 100644
--- a/lib/files/view.php
+++ b/lib/files/view.php
@@ -731,6 +731,7 @@ class View {
 	 * get the content of a directory
 	 *
 	 * @param string $directory path under datadirectory
+	 * @param string $mimetype_filter limit returned content to this mimetype or mimepart
 	 * @return array
 	 */
 	public function getDirectoryContent($directory, $mimetype_filter = '') {