diff -Naur unbound-1.4.20-orig/util/data/msgencode.c unbound-1.4.20/util/data/msgencode.c

--- unbound-1.4.20-orig/util/data/msgencode.c	2012-04-10 05:16:39.000000000 -0400

+++ unbound-1.4.20/util/data/msgencode.c	2013-05-21 15:47:01.435609420 -0400

@@ -659,7 +659,7 @@

 		}

 	}

 	/* roundrobin offset. using query id for random number */

-	rr_offset = RRSET_ROUNDROBIN?id:0;

+	rr_offset = RRSET_ROUNDROBIN ? ntohs(id) : 0;

 	/* insert answer section */

 	if((r=insert_section(rep, rep->an_numrrsets, &ancount, buffer,