diff --git a/clang/lib/AST/ItaniumMangle.cpp b/clang/lib/AST/ItaniumMangle.cpp
index b62442d..14ee74b 100644
--- a/clang/lib/AST/ItaniumMangle.cpp
+++ b/clang/lib/AST/ItaniumMangle.cpp
@@ -1471,6 +1471,7 @@
 
   case BuiltinType::Overload:
   case BuiltinType::Dependent:
+  case BuiltinType::BoundMember:
   case BuiltinType::UnknownAny:
     assert(false &&
            "Overloaded and dependent types shouldn't get to name mangling");