extern Lisp_Object Qno_iso6429, Qoutput_charset_conversion;
extern Lisp_Object Qpost_read_conversion, Qpre_write_conversion, Qseven;
extern Lisp_Object Qshift_jis, Qshort, Vcoding_system_for_read;
-extern Lisp_Object Vcoding_system_for_write, Vcoding_system_hashtable;
+extern Lisp_Object Vcoding_system_for_write, Vcoding_system_hash_table;
extern Lisp_Object Vfile_name_coding_system, Vkeyboard_coding_system;
extern Lisp_Object Vterminal_coding_system;