OPT_CALLBACK(0, "tag-of-filtered-object", &tag_of_filtered_mode, "mode",
                             "select handling of tags that tag filtered objects",
                             parse_opt_tag_of_filtered_mode),
-               OPT_STRING(0, "export-marks", &export_filename, "FILE",
+               OPT_STRING(0, "export-marks", &export_filename, "file",
                             "Dump marks to this file"),
-               OPT_STRING(0, "import-marks", &import_filename, "FILE",
+               OPT_STRING(0, "import-marks", &import_filename, "file",
                             "Import marks from this file"),
                OPT_BOOLEAN(0, "fake-missing-tagger", &fake_missing_tagger,
                             "Fake a tagger when tags lack one"),