--- old/src/java.base/share/classes/jdk/internal/jrtfs/JrtFileStore.java	2016-11-16 10:28:18.210497900 -0800
+++ new/src/java.base/share/classes/jdk/internal/jrtfs/JrtFileStore.java	2016-11-16 10:28:18.154497899 -0800
@@ -82,6 +82,11 @@
     }
 
     @Override
+    public int getBlockSize() throws IOException {
+        throw new UnsupportedOperationException("getBlockSize");
+    }
+
+    @Override
     public long getUsableSpace() throws IOException {
         throw new UnsupportedOperationException("getUsableSpace");
     }