--- old/src/java.base/share/native/libzip/CRC32.c	2018-03-28 12:27:41.754049084 +0200
+++ new/src/java.base/share/native/libzip/CRC32.c	2018-03-28 12:27:41.518049086 +0200
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 1997, 2012, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 1997, 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
@@ -54,7 +54,7 @@
     return crc;
 }
 
-jint JNICALL
+JNIEXPORT jint JNICALL
 ZIP_CRC32(jint crc, const jbyte *buf, jint len)
 {
     return crc32(crc, (Bytef*)buf, len);