--- a/src/java.base/unix/classes/sun/nio/fs/UnixConstants.java.template	Fri Oct 20 11:08:18 2017 -0700
+++ b/src/java.base/unix/classes/sun/nio/fs/UnixConstants.java.template	Tue Oct 17 16:51:11 2017 -0700
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2008, 2016, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2008, 2017, Oracle and/or its affiliates. All rights reserved.
  *
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  *
@@ -70,6 +70,12 @@
     static final int PREFIX_O_NOFOLLOW = 00;
 #endif
 
+#ifdef O_DIRECT
+    static final int PREFIX_O_DIRECT = O_DIRECT;
+#else
+    // not supported (dummy values will not be used at runtime).
+    static final int PREFIX_O_DIRECT = 00;
+#endif
 
     static final int PREFIX_S_IAMB =
         (S_IRUSR|S_IWUSR|S_IXUSR|S_IRGRP|S_IWGRP|S_IXGRP|S_IROTH|S_IWOTH|S_IXOTH);