--- old/src/hotspot/share/gc/g1/heapRegion.hpp	2018-11-19 14:06:54.676259800 -0800
+++ new/src/hotspot/share/gc/g1/heapRegion.hpp	2018-11-19 14:06:53.717475500 -0800
@@ -424,6 +424,8 @@
 
   bool is_old() const { return _type.is_old(); }
 
+  bool is_premature_old() const { return _type.is_premature_old(); }
+
   bool is_old_or_humongous() const { return _type.is_old_or_humongous(); }
 
   bool is_old_or_humongous_or_archive() const { return _type.is_old_or_humongous_or_archive(); }
@@ -613,6 +615,7 @@
 
   void move_to_old();
   void set_old();
+  void set_premature_old();
 
   void set_open_archive();
   void set_closed_archive();