--- a/hotspot/src/share/vm/gc_implementation/g1/heapRegionSeq.hpp	Wed Jun 27 15:23:36 2012 +0200
+++ b/hotspot/src/share/vm/gc_implementation/g1/heapRegionSeq.hpp	Thu Jun 28 17:03:16 2012 -0400
@@ -53,7 +53,7 @@
 //
 // and maintain that: _length <= _allocated_length <= _max_length
 
-class HeapRegionSeq: public CHeapObj {
+class HeapRegionSeq: public CHeapObj<mtGC> {
   friend class VMStructs;
 
   // The array that holds the HeapRegions.