--- old/src/java.base/share/classes/java/util/zip/ZStreamRef.java	Wed Oct 14 14:09:48 2015
+++ new/src/java.base/share/classes/java/util/zip/ZStreamRef.java	Wed Oct 14 14:09:47 2015
@@ -31,7 +31,7 @@
 
 class ZStreamRef {
 
-    private long address;
+    private volatile long address;
     ZStreamRef (long address) {
         this.address = address;
     }