--- old/src/hotspot/share/memory/metaspace.hpp	2018-06-08 19:45:27.625439800 +0200
+++ new/src/hotspot/share/memory/metaspace.hpp	2018-06-08 19:45:27.355428086 +0200
@@ -229,6 +229,7 @@
 // Manages the metaspace portion belonging to a class loader
 class ClassLoaderMetaspace : public CHeapObj<mtClass> {
   friend class CollectedHeap; // For expand_and_allocate()
+  friend class ZCollectedHeap; // For expand_and_allocate()
   friend class Metaspace;
   friend class MetaspaceUtils;
   friend class metaspace::PrintCLDMetaspaceInfoClosure;