--- a/src/hotspot/share/memory/metaspace.hpp	Tue Jun 12 07:52:30 2018 -0700
+++ b/src/hotspot/share/memory/metaspace.hpp	Tue Jun 12 17:40:28 2018 +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;