Index: wasm/WriterUtils.cpp
===================================================================
--- wasm/WriterUtils.cpp
+++ wasm/WriterUtils.cpp
@@ -185,6 +185,8 @@
     return "F32";
   case ValType::F64:
     return "F64";
+  case ValType::V128:
+    return "V128";
   case ValType::EXCEPT_REF:
     return "except_ref";
   }