diff -r 7a72e5ed1d10 -r 34e2a243d69a hotspot/src/share/vm/gc_implementation/g1/g1MarkSweep.cpp
--- a/hotspot/src/share/vm/gc_implementation/g1/g1MarkSweep.cpp	Mon May 04 02:57:39 2009 -0700
+++ b/hotspot/src/share/vm/gc_implementation/g1/g1MarkSweep.cpp	Thu Apr 30 15:07:53 2009 -0700
@@ -57,7 +57,7 @@
 
   mark_sweep_phase1(marked_for_unloading, clear_all_softrefs);
 
-  if (G1VerifyConcMark) {
+  if (VerifyDuringGC) {
       G1CollectedHeap* g1h = G1CollectedHeap::heap();
       g1h->checkConcurrentMark();
   }