diff -r b2b4df384c83 -r 912c55e702d6 src/hotspot/share/gc/shared/collectedHeap.hpp
--- a/src/hotspot/share/gc/shared/collectedHeap.hpp	Fri Nov 10 19:10:54 2017 +0100
+++ b/src/hotspot/share/gc/shared/collectedHeap.hpp	Thu Nov 30 17:13:33 2017 +0100
@@ -81,9 +81,10 @@
 //
 // CollectedHeap
 //   GenCollectedHeap
+//     SerialHeap
+//     CMSHeap
 //   G1CollectedHeap
 //   ParallelScavengeHeap
-//   CMSHeap
 //
 class CollectedHeap : public CHeapObj<mtInternal> {
   friend class VMStructs;
@@ -193,7 +194,7 @@
 
  public:
   enum Name {
-    GenCollectedHeap,
+    SerialHeap,
     ParallelScavengeHeap,
     G1CollectedHeap,
     CMSHeap,