diff --git a/src/block/block_open.c b/src/block/block_open.c
index f4da5ca..eb42ddb 100644
--- a/src/block/block_open.c
+++ b/src/block/block_open.c
@@ -209,7 +209,7 @@ __wt_block_open(WT_SESSION_IMPL *session,
        block->preload_available = true;
 
        /* Open the underlying file handle. */
-       WT_ERR(__wt_open(session, filename, WT_FILE_TYPE_DATA, 0, &block->fh));
+       WT_ERR(__wt_open(session, filename, WT_FILE_TYPE_DATA, readonly ? WT_OPEN_READONLY : 0, &block->fh));
 
        /* Set the file's size. */
        WT_ERR(__wt_filesize(session, block->fh, &block->size));

#!/usr/bin/env python

import os
import wiredtiger, wttest
from suite_subprocess import suite_subprocess
from helper import simple_populate

class f(wttest.WiredTigerTestCase, suite_subprocess):
    def test_dump(self):
        dir='XXX'
        uri = 'lsm:xxx'
        simple_populate(self, uri, 'key_format=S', 100)

        os.mkdir(dir)
        self.runWt(['dump', uri], outfilename='dump.out')

        self.runWt(['-h', dir, 'load', '-f', 'dump.out'])
        self.runWt(['-h', dir, 'load', '-f', 'dump.out'])

if __name__ == '__main__':
    wttest.run()