--- a/src/share/vm/memory/genCollectedHeap.hpp	Mon Mar 15 15:51:36 2010 -0400
+++ b/src/share/vm/memory/genCollectedHeap.hpp	Wed Mar 24 17:16:33 2010 -0700
@@ -260,6 +260,10 @@
     return true;
   }
 
+  virtual bool card_mark_must_follow_store() const {
+    return UseConcMarkSweepGC;
+  }
+
   // We don't need barriers for stores to objects in the
   // young gen and, a fortiori, for initializing stores to
   // objects therein. This applies to {DefNew,ParNew}+{Tenured,CMS}