diff -r f2c23221bbd5 -r d9b46b7de028 src/hotspot/share/classfile/systemDictionary.hpp
--- a/src/hotspot/share/classfile/systemDictionary.hpp	Fri Apr 05 07:10:07 2019 -0400
+++ b/src/hotspot/share/classfile/systemDictionary.hpp	Fri Apr 05 10:01:09 2019 +0100
@@ -177,6 +177,7 @@
   do_klass(AssertionStatusDirectives_klass,             java_lang_AssertionStatusDirectives                   ) \
   do_klass(StringBuffer_klass,                          java_lang_StringBuffer                                ) \
   do_klass(StringBuilder_klass,                         java_lang_StringBuilder                               ) \
+  do_klass(UnsafeConstants_klass,                       jdk_internal_misc_UnsafeConstants                     ) \
   do_klass(internal_Unsafe_klass,                       jdk_internal_misc_Unsafe                              ) \
   do_klass(module_Modules_klass,                        jdk_internal_module_Modules                           ) \
                                                                                                                 \