--- old/src/cpu/x86/vm/interp_masm_x86_64.cpp	2018-12-12 17:29:34.753456148 +0000
+++ new/src/cpu/x86/vm/interp_masm_x86_64.cpp	2018-12-12 17:29:34.653455533 +0000
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2003, 2016, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2003, 2018, Oracle and/or its affiliates. All rights reserved.
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  *
  * This code is free software; you can redistribute it and/or modify it
@@ -1505,5 +1505,7 @@
   incrementl(scratch, increment);
   movl(counter_addr, scratch);
   andl(scratch, mask);
-  jcc(cond, *where);
+  if (where != NULL) {
+    jcc(cond, *where);
+  }
 }