diff --git a/xpfe/browser/resources/locale/en-US/navigator.properties b/xpfe/browser/resources/locale/en-US/navigator.properties
index adc9bc9688c..c0b060d5dc9 100644
--- a/xpfe/browser/resources/locale/en-US/navigator.properties
+++ b/xpfe/browser/resources/locale/en-US/navigator.properties
@@ -33,7 +33,7 @@ general.useragent.locale=en-US
 intl.accept_languages=en
 intl.charsetmenu.browser.static=iso-8859-1
 intl.charset.default=ISO-8859-1
-intl.charsetmenu.mailedit=iso-8859-1, iso-8859-15, armscii-8, iso-8859-4, iso-8859-14, so-8859-2, gb2312, big5, koi8-r, windows-1251, koi8-u, iso-8859-7, iso-2022-jp, euc-kr, iso-8859-10, iso-8859-3, tis-620, iso-8859-9, utf-8, viscii
+intl.charsetmenu.mailedit=iso-8859-1, iso-8859-15, armscii-8, iso-8859-4, iso-8859-14, iso-8859-2, gb2312, big5, koi8-r, windows-1251, koi8-u, iso-8859-7, iso-2022-jp, euc-kr, iso-8859-10, iso-8859-3, tis-620, iso-8859-9, utf-8, viscii
 wallet.Server=http://www.mozilla.org/wallet/tables/
 #config.js
 #