--- old/src/hotspot/share/code/codeCache.hpp	2018-11-30 10:22:16.347738853 +0100
+++ new/src/hotspot/share/code/codeCache.hpp	2018-11-30 10:22:16.195740514 +0100
@@ -75,6 +75,7 @@
 class ExceptionCache;
 class KlassDepChange;
 class OopClosure;
+class ShenandoahParallelCodeHeapIterator;
 
 class CodeCache : AllStatic {
   friend class VMStructs;
@@ -82,6 +83,7 @@
   template <class T, class Filter> friend class CodeBlobIterator;
   friend class WhiteBox;
   friend class CodeCacheLoader;
+  friend class ShenandoahParallelCodeHeapIterator;
  private:
   // CodeHeaps of the cache
   static GrowableArray<CodeHeap*>* _heaps;