diff --git a/mozilla/intl/uconv/ucvtw/nsUCvTWCID.h b/mozilla/intl/uconv/ucvtw/nsUCvTWCID.h
index 9019cc42008..a53188fae1b 100644
--- a/mozilla/intl/uconv/ucvtw/nsUCvTWCID.h
+++ b/mozilla/intl/uconv/ucvtw/nsUCvTWCID.h
@@ -32,4 +32,10 @@ NS_DECLARE_ID(kBIG5ToUnicodeCID,
 NS_DECLARE_ID(kUnicodeToBIG5CID, 
   0xefc323e2, 0xec62, 0x11d2, 0x8a, 0xac, 0x0, 0x60, 0x8, 0x11, 0xa8, 0x36);
 
+
+// Class ID for our UnicodeToBIG5NoAscii charset converter
+// {BA615195-1DFA-11d3-B3BF-00805F8A6670}
+NS_DECLARE_ID(kUnicodeToBIG5NoAsciiCID, 
+0xba615195, 0x1dfa, 0x11d3, 0xb3, 0xbf, 0x0, 0x80, 0x5f, 0x8a, 0x66, 0x70);
+
 #endif /* nsUCvTWCID_h___ */