--- a/src/hotspot/share/memory/metaspace.hpp	Fri Mar 16 08:26:53 2018 -0400
+++ b/src/hotspot/share/memory/metaspace.hpp	Fri Mar 16 09:12:13 2018 -0400
@@ -66,6 +66,7 @@
 class PrintCLDMetaspaceInfoClosure;
 class SpaceManager;
 class VirtualSpaceList;
+class CollectedHeap;
 
 // Metaspaces each have a  SpaceManager and allocations
 // are done by the SpaceManager.  Allocations are done