--- a/src/hotspot/share/runtime/arguments.hpp	Wed Jun 06 10:32:59 2018 +0200
+++ b/src/hotspot/share/runtime/arguments.hpp	Mon Jun 11 09:29:44 2018 +0200
@@ -651,6 +651,7 @@
   static void PropertyList_unique_add(SystemProperty** plist, const char* k, const char* v,
                                       PropertyAppendable append, PropertyWriteable writeable,
                                       PropertyInternal internal);
+  static void PropertyList_update_value(SystemProperty* plist, const char* k, const char* v);
   static const char* PropertyList_get_value(SystemProperty* plist, const char* key);
   static const char* PropertyList_get_readable_value(SystemProperty* plist, const char* key);
   static int  PropertyList_count(SystemProperty* pl);