--- old/src/share/vm/gc/g1/dirtyCardQueue.hpp	2017-04-25 16:44:29.827175373 +0200
+++ new/src/share/vm/gc/g1/dirtyCardQueue.hpp	2017-04-25 16:44:29.663175379 +0200
@@ -43,7 +43,7 @@
 // A ptrQueue whose elements are "oops", pointers to object heads.
 class DirtyCardQueue: public PtrQueue {
 public:
-  DirtyCardQueue(DirtyCardQueueSet* qset, bool permanent = false);
+  DirtyCardQueue(DirtyCardQueueSet* qset = NULL, bool permanent = false);
 
   // Flush before destroying; queue may be used to capture pending work while
   // doing something else, with auto-flush on completion.