--- tar-1.23/src/suffix.c.orig	2010-03-09 21:52:41.000000000 +0900
+++ tar-1.23/src/suffix.c	2010-10-22 22:30:07.000000000 +0900
@@ -43,6 +43,7 @@ static struct compression_suffix compres
   { S(tlz,  LZMA) },
   { S(lzo,  LZOP) },
   { S(xz,   XZ) },
+  { S(txz,  XZ) },
 #undef S
 #undef __CAT2__
 };