--- old/src/hotspot/share/utilities/hashtable.hpp	2018-03-26 09:40:02.243202985 +0900
+++ new/src/hotspot/share/utilities/hashtable.hpp	2018-03-26 09:40:01.907200126 +0900
@@ -31,6 +31,9 @@
 #include "oops/symbol.hpp"
 #include "runtime/handles.hpp"
 
+// Version for StringTable and SymbolTable
+#define HASHTABLE_VERSION "VERSION: 1.1"
+
 // This is a generic hashtable, designed to be used for the symbol
 // and string tables.
 //