diff --git a/lib/AST/ItaniumMangle.cpp b/lib/AST/ItaniumMangle.cpp
index 0621d7b1ad868bdaad433a1b3ae09eb09e0cde09..ba67fad6489dda3615790d3f0ba2221a6d7d5815 100644
--- a/lib/AST/ItaniumMangle.cpp
+++ b/lib/AST/ItaniumMangle.cpp
@@ -1919,7 +1919,7 @@ void CXXNameMangler::mangleType(const BuiltinType *T) {
   //                 ::= x  # long long, __int64
   //                 ::= y  # unsigned long long, __int64
   //                 ::= n  # __int128
-  // UNSUPPORTED:    ::= o  # unsigned __int128
+  //                 ::= o  # unsigned __int128
   //                 ::= f  # float
   //                 ::= d  # double
   //                 ::= e  # long double, __float80