--- old/src/hotspot/share/runtime/fieldDescriptor.hpp	2018-02-15 15:33:54.000000000 -0500
+++ new/src/hotspot/share/runtime/fieldDescriptor.hpp	2018-02-15 15:33:54.000000000 -0500
@@ -101,6 +101,7 @@
   bool is_volatile()              const    { return access_flags().is_volatile(); }
   bool is_transient()             const    { return access_flags().is_transient(); }
   bool is_flatten()               const    { return field()->is_flatten(); }
+  bool is_flattenable()           const    { return field()->is_flattenable(); }
 
   bool is_synthetic()             const    { return access_flags().is_synthetic(); }