diff a/src/hotspot/cpu/x86/vm_version_x86.cpp b/src/hotspot/cpu/x86/vm_version_x86.cpp
--- a/src/hotspot/cpu/x86/vm_version_x86.cpp
+++ b/src/hotspot/cpu/x86/vm_version_x86.cpp
@@ -1594,10 +1594,14 @@
   // This machine allows unaligned memory accesses
   if (FLAG_IS_DEFAULT(UseUnalignedAccesses)) {
     FLAG_SET_DEFAULT(UseUnalignedAccesses, true);
   }
 
+  if (FLAG_IS_DEFAULT(UseMD5Intrinsics)) {
+    UseMD5Intrinsics = true;
+  }
+
 #ifndef PRODUCT
   if (log_is_enabled(Info, os, cpu)) {
     LogStream ls(Log(os, cpu)::info());
     outputStream* log = &ls;
     log->print_cr("Logical CPUs per core: %u",