--- old/src/share/vm/gc/g1/g1OopClosures.hpp	2015-12-04 15:40:32.756429005 +0100
+++ new/src/share/vm/gc/g1/g1OopClosures.hpp	2015-12-04 15:40:32.664425197 +0100
@@ -121,7 +121,7 @@
   G1MarkPromotedFromRoot
 };
 
-template <G1Barrier barrier, G1Mark do_mark_object>
+template <G1Barrier barrier, G1Mark do_mark_object, bool use_ext>
 class G1ParCopyClosure : public G1ParCopyHelper {
 public:
   G1ParCopyClosure(G1CollectedHeap* g1, G1ParScanThreadState* par_scan_state) :