--- a/src/hotspot/share/gc/z/zHeap.hpp	Tue Apr 02 10:04:25 2019 +0200
+++ b/src/hotspot/share/gc/z/zHeap.hpp	Tue Apr 02 10:04:25 2019 +0200
@@ -103,6 +103,7 @@
   size_t unsafe_max_tlab_alloc() const;
 
   bool is_in(uintptr_t addr) const;
+  uint32_t hash_oop(oop obj) const;
 
   // Block
   uintptr_t block_start(uintptr_t addr) const;