--- old/src/java.base/unix/classes/sun/nio/fs/UnixFileStore.java	2016-11-16 10:28:19.648497913 -0800
+++ new/src/java.base/unix/classes/sun/nio/fs/UnixFileStore.java	2016-11-16 10:28:19.591497913 -0800
@@ -126,6 +126,12 @@
     }
 
     @Override
+    public int getBlockSize() throws IOException {
+       UnixFileStoreAttributes attrs = readAttributes();
+       return (int)attrs.blockSize();
+    }
+
+    @Override
     public long getUnallocatedSpace() throws IOException {
         UnixFileStoreAttributes attrs = readAttributes();
         return attrs.blockSize() * attrs.freeBlocks();