--- old/src/hotspot/share/gc/shared/collectedHeap.hpp	2018-06-01 22:29:49.361668805 +0200
+++ new/src/hotspot/share/gc/shared/collectedHeap.hpp	2018-06-01 22:29:49.104657711 +0200
@@ -89,6 +89,7 @@
 //     CMSHeap
 //   G1CollectedHeap
 //   ParallelScavengeHeap
+//   ZCollectedHeap
 //
 class CollectedHeap : public CHeapObj<mtInternal> {
   friend class VMStructs;
@@ -196,7 +197,8 @@
     Serial,
     Parallel,
     CMS,
-    G1
+    G1,
+    Z
   };
 
   static inline size_t filler_array_max_size() {