--- a/jdk/src/java.base/share/classes/java/util/zip/ZStreamRef.java	Wed Oct 14 16:17:08 2015 -0700
+++ b/jdk/src/java.base/share/classes/java/util/zip/ZStreamRef.java	Thu Oct 15 09:33:03 2015 +0100
@@ -31,7 +31,7 @@
 
 class ZStreamRef {
 
-    private long address;
+    private volatile long address;
     ZStreamRef (long address) {
         this.address = address;
     }