--- old/src/hotspot/share/gc/parallel/parallelArguments.hpp	2018-02-20 23:17:44.136734740 +0100
+++ new/src/hotspot/share/gc/parallel/parallelArguments.hpp	2018-02-20 23:17:43.908726946 +0100
@@ -25,11 +25,15 @@
 #ifndef SHARE_GC_PARALLEL_PARALLELARGUMENTS_HPP
 #define SHARE_GC_PARALLEL_PARALLELARGUMENTS_HPP
 
-#include "gc/shared/gcArguments.hpp"
+#include "gc/parallel/psSettings.hpp"
+#include "gc/shared/genArguments.hpp"
 
-class CollectedHeap;
+class ParallelArguments : public GenArguments {
+private:
+  PSSettings initialize_heap_flags();
+
+  void initialize_heap_flags_one_pass(PSSettings& s);
 
-class ParallelArguments : public GCArguments {
 public:
   virtual void initialize_flags();
   virtual size_t conservative_max_heap_alignment();