--- old/src/hotspot/share/utilities/accessFlags.hpp	2018-02-15 15:34:06.000000000 -0500
+++ new/src/hotspot/share/utilities/accessFlags.hpp	2018-02-15 15:34:06.000000000 -0500
@@ -121,6 +121,7 @@
   bool is_abstract    () const         { return (_flags & JVM_ACC_ABSTRACT    ) != 0; }
   bool is_strict      () const         { return (_flags & JVM_ACC_STRICT      ) != 0; }
   bool is_value_type  () const         { return (_flags & JVM_ACC_VALUE       ) != 0; }
+  bool is_flattenable () const         { return (_flags & JVM_ACC_FLATTENABLE ) != 0; }
 
   // Attribute flags
   bool is_synthetic   () const         { return (_flags & JVM_ACC_SYNTHETIC   ) != 0; }