--- old/src/share/vm/runtime/arguments.cpp	2017-05-29 18:07:47.728021967 +0200
+++ new/src/share/vm/runtime/arguments.cpp	2017-05-29 18:07:47.652022050 +0200
@@ -2522,6 +2522,11 @@
     warning("ValueTypePassFieldsAsArgs is not supported on this platform");
   }
 
+  if (LP64_ONLY(false &&) !FLAG_IS_DEFAULT(ValueTypeReturnedAsFields)) {
+    FLAG_SET_CMDLINE(bool, ValueTypeReturnedAsFields, false);
+    warning("ValueTypeReturnedAsFields is not supported on this platform");
+  }
+
   if (FLAG_IS_DEFAULT(TieredCompilation)) {
     // C1 has no support for value types
     TieredCompilation = false;