diff --git a/bgpd/bgpd.h b/bgpd/bgpd.h
index 3d516d3..688f459 100644
--- a/bgpd/bgpd.h
+++ b/bgpd/bgpd.h
@@ -313,6 +313,12 @@
   struct stream_fifo *obuf;
   struct stream *work;
 
+  /* We use a separate stream to encode MP_REACH_NLRI for efficient
+   * NLRI packing. peer->work stores all the other attributes. The
+   * actual packet is then constructed by concatenating the two.
+   */
+  struct stream *scratch;
+
   /* Status of the peer. */
   int status;
   int ostatus;