diff -Naur evolution-1.4.0-orig/camel/camel-charset-map.c evolution-1.4.0/camel/camel-charset-map.c
--- evolution-1.4.0-orig/camel/camel-charset-map.c	2003-02-26 03:50:57.000000000 +0700
+++ evolution-1.4.0/camel/camel-charset-map.c	2003-06-24 22:07:49.000000000 +0700
@@ -74,6 +74,7 @@
 	{ "iso-8859-15", 0 },	/* New-and-improved iso-8859-1, but most
 				 * programs that support this support UTF8
 				 */
+	{ "tis-620", 0 }, /* Thai */
 	{ "windows-1251", 0 },	/* Russian */
 	{ 0, 0 }
 };
diff -Naur evolution-1.4.0-orig/widgets/misc/e-charset-picker.c evolution-1.4.0/widgets/misc/e-charset-picker.c
--- evolution-1.4.0-orig/widgets/misc/e-charset-picker.c	2003-05-20 03:28:02.000000000 +0700
+++ evolution-1.4.0/widgets/misc/e-charset-picker.c	2003-06-25 01:44:17.000000000 +0700
@@ -51,6 +51,7 @@
 	E_CHARSET_HEBREW,
 	E_CHARSET_JAPANESE,
 	E_CHARSET_KOREAN,
+	E_CHARSET_THAI,
 	E_CHARSET_TURKISH,
 	E_CHARSET_UNICODE,
 	E_CHARSET_WESTERN_EUROPEAN
@@ -66,6 +67,7 @@
 	N_("Hebrew"),
 	N_("Japanese"),
 	N_("Korean"),
+	N_("Thai"),
 	N_("Turkish"),
 	N_("Unicode"),
 	N_("Western European"),
@@ -99,6 +101,7 @@
 	{ "EUC-JP", E_CHARSET_JAPANESE, NULL },
 	{ "Shift_JIS", E_CHARSET_JAPANESE, NULL },
 	{ "EUC-KR", E_CHARSET_KOREAN, NULL },
+	{ "TIS-620", E_CHARSET_THAI, NULL },
 	{ "ISO-8859-9", E_CHARSET_TURKISH, NULL },
 	{ "UTF-8", E_CHARSET_UNICODE, NULL },
 	{ "UTF-7", E_CHARSET_UNICODE, NULL },
