diff --git a/lib/filestorage/zip_archive.php b/lib/filestorage/zip_archive.php
index f7fe3c3a159..ba963935b1e 100644
--- a/lib/filestorage/zip_archive.php
+++ b/lib/filestorage/zip_archive.php
@@ -610,6 +610,13 @@ class zip_archive extends file_archive {
                             case 'ISO-8859-6': $encoding = 'CP720'; break;
                             case 'ISO-8859-7': $encoding = 'CP737'; break;
                             case 'ISO-8859-8': $encoding = 'CP862'; break;
+                            case 'UTF-8':
+                                if ($winchar = get_string('localewincharset', 'langconfig')) {
+                                    // Most probably works only for zh_cn,
+                                    // if there are more problems we could add zipcharset to langconfig files.
+                                    $encoding = $winchar;
+                                }
+                                break;
                         }
                     }
                     $newname = @textlib::convert($name, $encoding, 'utf-8');