--- a/src/hotspot/share/gc/shared/collectedHeap.hpp	Tue Jun 12 07:52:30 2018 -0700
+++ b/src/hotspot/share/gc/shared/collectedHeap.hpp	Tue Jun 12 17:40:28 2018 +0200
@@ -89,6 +89,7 @@
 //     CMSHeap
 //   G1CollectedHeap
 //   ParallelScavengeHeap
+//   ZCollectedHeap
 //
 class CollectedHeap : public CHeapObj<mtInternal> {
   friend class VMStructs;
@@ -207,7 +208,8 @@
     Parallel,
     CMS,
     G1,
-    Epsilon
+    Epsilon,
+    Z
   };
 
   static inline size_t filler_array_max_size() {