--- old/src/hotspot/share/code/codeCache.hpp	2020-01-17 17:14:18.407116797 +0100
+++ new/src/hotspot/share/code/codeCache.hpp	2020-01-17 17:14:18.310116802 +0100
@@ -73,6 +73,7 @@
 
 class OopClosure;
 class KlassDepChange;
+class ShenandoahParallelCodeHeapIterator;
 
 class CodeCache : AllStatic {
   friend class VMStructs;
@@ -80,6 +81,7 @@
   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;