diff --git a/lib/sshkit/backends/netssh/sftp_transfer.rb b/lib/sshkit/backends/netssh/sftp_transfer.rb
index 20c230ba..665568db 100644
--- a/lib/sshkit/backends/netssh/sftp_transfer.rb
+++ b/lib/sshkit/backends/netssh/sftp_transfer.rb
@@ -29,7 +29,7 @@ def download!(remote, local, options)
         end
 
         def on_get(download, entry, offset, data)
-          entry.size ||= download.sftp.file.open(entry.remote, &:size)
+          entry.size ||= download.sftp.file.open(entry.remote) { |file| file.stat.size }
           summarizer.call(nil, entry.remote, offset + data.bytesize, entry.size)
         end