--- a/src/java.base/share/native/libnet/net_util.h	Thu Jan 03 17:39:39 2019 +0800
+++ b/src/java.base/share/native/libnet/net_util.h	Tue Jan 22 16:39:52 2019 +0000
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 1997, 2018, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 1997, 2019, 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
@@ -181,6 +181,9 @@
  */
 
 JNIEXPORT int JNICALL
+NET_SocketAvailable(int fd, int *pbytes);
+
+JNIEXPORT int JNICALL
 NET_GetSockOpt(int fd, int level, int opt, void *result, int *len);
 
 JNIEXPORT int JNICALL