--- old/src/hotspot/share/memory/metaspaceClosure.hpp	2018-11-16 19:19:37.776294093 -0800
+++ new/src/hotspot/share/memory/metaspaceClosure.hpp	2018-11-16 19:19:37.508283893 -0800
@@ -29,7 +29,7 @@
 #include "memory/allocation.hpp"
 #include "oops/array.hpp"
 #include "utilities/growableArray.hpp"
-#include "utilities/hashtable.hpp"
+#include "utilities/hashtable.inline.hpp"
 
 // The metadata hierarchy is separate from the oop hierarchy
   class MetaspaceObj;        // no C++ vtable
@@ -267,7 +267,7 @@
   UniqueMetaspaceClosure() : _has_been_visited(15889) {}
 
 private:
-  KVHashtable<address, bool> _has_been_visited;
+  KVHashtable<address, bool, mtInternal> _has_been_visited;
 };
 
 #endif // SHARE_VM_MEMORY_METASPACE_ITERATOR_HPP