--- old/src/share/classes/com/sun/java/util/jar/pack/UnpackerImpl.java	Tue Apr 30 06:47:17 2013
+++ new/src/share/classes/com/sun/java/util/jar/pack/UnpackerImpl.java	Tue Apr 30 06:47:17 2013
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2003, 2012, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2003, 2013, 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
@@ -132,7 +132,12 @@
                 in0.close();
                 Utils.markJarFile(out);
             } else {
-                (new NativeUnpack(this)).run(in0, out);
+                try {
+                    (new NativeUnpack(this)).run(in0, out);
+                } catch (UnsatisfiedLinkError ule) {
+                    // failover to java implementation
+                    (new DoUnpack()).run(in0, out);
+                }
                 in0.close();
                 Utils.markJarFile(out);
             }