{ "extract-to=FOLDER", 'x', 0, G_OPTION_ARG_FILENAME, &extract_path, "Extract the archive to the specified folder and quits.", NULL }, Should be: { N_("extract-to"), 'x', 0, G_OPTION_ARG_FILENAME, &extract_path, N_("Extract the archive to the specified folder and quits."), N_("FOLDER")}, IIRC... Nick