diff --git a/UI/MailPartViewers/UIxMailPartHTMLViewer.m b/UI/MailPartViewers/UIxMailPartHTMLViewer.m
index 5f5960310..d79e32e65 100644
--- a/UI/MailPartViewers/UIxMailPartHTMLViewer.m
+++ b/UI/MailPartViewers/UIxMailPartHTMLViewer.m
@@ -85,6 +85,7 @@ _xmlCharsetForCharset (NSString *charset)
     { @"windows-1255", XML_CHAR_ENCODING_ERROR}, // unsupported, will trigger windows-1255 -> utf8 conversion
     { @"windows-1256", XML_CHAR_ENCODING_ERROR}, // unsupported, will trigger windows-1255 -> utf8 conversion
     { @"windows-1257", XML_CHAR_ENCODING_ERROR}, // unsupported, will trigger windows-1257 -> utf8 conversion
+    { @"windows-874", XML_CHAR_ENCODING_ERROR},  // unsupported, will trigger windows-874 -> utf8 conversion
     { @"gb2312", XML_CHAR_ENCODING_ERROR},       // unsupported, will trigger gb2312 -> utf8 conversion
     { @"gbk", XML_CHAR_ENCODING_ERROR},          // unsupported, will trigger gb2312 -> utf8 conversion
     { @"gb18030", XML_CHAR_ENCODING_ERROR},      // unsupported, will trigger gb2312 -> utf8 conversion