--- a/src/hotspot/share/gc/g1/g1OopClosures.hpp	Mon Mar 05 11:16:23 2018 +0100
+++ b/src/hotspot/share/gc/g1/g1OopClosures.hpp	Mon Mar 05 11:32:17 2018 +0100
@@ -139,7 +139,7 @@
   G1MarkPromotedFromRoot
 };
 
-template <G1Barrier barrier, G1Mark do_mark_object, bool use_ext>
+template <G1Barrier barrier, G1Mark do_mark_object>
 class G1ParCopyClosure : public G1ParCopyHelper {
 public:
   G1ParCopyClosure(G1CollectedHeap* g1, G1ParScanThreadState* par_scan_state) :