diff --git a/transliteration.module b/transliteration.module
index 6505c2963f92fdf357e3474e0e30d348798e201d..913a53127f89136004d1ad9455042c6a54c33fee 100644
--- a/transliteration.module
+++ b/transliteration.module
@@ -61,9 +61,11 @@ function transliteration_form_system_file_system_settings_alter(&$form, &$form_s
  *
  * The resulting file name has white space replaced with underscores, consists
  * of only US-ASCII characters, and is converted to lowercase (if configured).
+ * If multiple files have been submitted as an array, the names will be
+ * processed recursively.
  *
  * @param $filename
- *   A file name.
+ *   A file name, or an array of file names.
  * @param $source_langcode
  *   Optional ISO 639 language code that denotes the language of the input and
  *   is used to apply language-specific variations. If the source language is
@@ -71,11 +73,17 @@ function transliteration_form_system_file_system_settings_alter(&$form, &$form_s
  *   argument to the site default language to produce consistent results.
  *   Otherwise the current display language will be used.
  * @return
- *   Sanitized file name.
+ *   Sanitized file name, or array of sanitized file names.
  *
  * @see language_default()
  */
 function transliteration_clean_filename($filename, $source_langcode = NULL) {
+  if (is_array($filename)) {
+    foreach ($filename as $key => $value) {
+      $filename[$key] = transliteration_clean_filename($value, $source_langcode);
+    }
+    return $filename;
+  }
   $filename = transliteration_get($filename, '', $source_langcode);
   // Replace whitespace.
   $filename = str_replace(' ', '_', $filename);