--- a/src/hotspot/share/gc/cms/vmStructs_cms.hpp	Sun May 20 22:10:45 2018 +0200
+++ b/src/hotspot/share/gc/cms/vmStructs_cms.hpp	Mon May 21 11:33:59 2018 +0200
@@ -70,7 +70,7 @@
   declare_toplevel_type(CMSCollector)                                     \
   declare_toplevel_type(CMSBitMap)                                        \
   declare_toplevel_type(FreeChunk)                                        \
-  declare_toplevel_type(Metablock)                                        \
+  declare_toplevel_type(metaspace::Metablock)                             \
   declare_toplevel_type(ConcurrentMarkSweepThread*)                       \
   declare_toplevel_type(ConcurrentMarkSweepGeneration*)                   \
   declare_toplevel_type(CompactibleFreeListSpace*)                        \